NCERT Solutions for Class 9 Maths in Hindi Medium<\/a>. Here we have given NCERT Solutions for Class 9 Maths Chapter 12 Heron’s Formula.<\/p>\n\u092a\u094d\u0930\u0936\u094d\u0928\u093e\u0935\u0932\u0940 12.1<\/strong><\/span><\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924 Q1. \u090f\u0915 \u092f\u093e\u0924\u093e\u092f\u093e\u0924 \u0938\u0902\u0915\u0947\u0924 \u092c\u094b\u0930\u094d\u0921 \u092a\u0930 <\/strong>\u2018\u0906\u0917\u0947 \u0938\u094d\u0915\u0942\u0932 \u0939\u0948\u2019 \u0932\u093f\u0916\u093e \u0939\u0948 \u0914\u0930 \u092f\u0939 \u092d\u0941\u091c\u093e ‘<\/strong>a<\/em><\/strong>‘ \u0935\u093e\u0932\u0947 \u090f\u0915 \u0938\u092e\u092c\u093e\u0939\u0941 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u0947 \u0906\u0915\u093e\u0930 \u0915\u093e \u0939\u0948\u0964 \u0939\u0940\u0930\u094b\u0928 \u0915\u0947 \u0938\u0942\u0924\u094d\u0930 \u0915\u093e \u092a\u094d\u0930\u092f\u094b\u0917 \u0915\u0930\u0915\u0947 \u0907\u0938 \u092c\u094b\u0930\u094d\u0921 \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964 \u092f\u0926\u093f \u0938\u0902\u0915\u0947\u0924 \u092c\u094b\u0930\u094d\u0921 \u0915\u093e \u092a\u0930\u093f\u092e\u093e\u092a 180 cm \u0939\u0948<\/strong>, \u0924\u094b \u0907\u0938\u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u0915\u094d\u092f\u093e \u0939\u094b\u0917\u093e?<\/strong> \n \n <\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924\u00a0Q2. \u0915\u093f\u0938\u0940 \u092b\u094d\u0930\u0932\u093e\u0908\u0913\u0935\u0930\u00a0<\/strong>(flyover)\u00a0<\/strong>\u0915\u0940 \u0924\u094d\u0930\u093f\u092d\u0941\u091c\u093e\u0915\u093e\u0930 \u0926\u0940\u0935\u093e\u0930 \u0915\u094b \u0935\u093f\u091c\u094d\u091e\u093e\u092a\u0928\u094b\u0902 \u0915\u0947 \u0932\u093f\u090f \u092a\u094d\u0930\u092f\u094b\u0917 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948\u0964 \u0926\u0940\u0935\u093e\u0930 \u0915\u0940 \u092d\u0941\u091c\u093e\u0913\u0902 \u0915\u0940 \u0932\u0902\u092c\u093e\u0907\u092f\u093e\u0901 122 m<\/strong>, 22 m \u0914\u0930 120 m \u0939\u0948\u0902 (\u0926\u0947\u0916\u093f\u090f \u0906\u0915\u0943\u0924\u093f 12.9)\u0964 \u0907\u0938 \u0935\u093f\u091c\u094d\u091e\u093e\u092a\u0928 \u0938\u0947 \u092a\u094d\u0930\u0924\u093f \u0935\u0930\u094d\u0937 5000 \u0930\u0941 \u092a\u094d\u0930\u0924\u093f m2<\/sup>\u00a0\u0915\u0940 \u092a\u094d\u0930\u093e\u092a\u094d\u0924\u093f \u0939\u094b\u0924\u0940 \u0939\u0948\u0964 \u090f\u0915 \u0915\u092e\u094d\u092a\u0928\u0940 \u0928\u0947 \u090f\u0915 \u0926\u0940\u0935\u093e\u0930 \u0915\u094b \u0935\u093f\u091c\u094d\u091e\u093e\u092a\u0928 \u0926\u0947\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f 3 \u092e\u0939\u0940\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f \u0915\u093f\u0930\u093e\u090f \u092a\u0930 \u0932\u093f\u092f\u093e\u0964 \u0909\u0938\u0928\u0947 \u0915\u0941\u0932 \u0915\u093f\u0924\u0928\u093e \u0915\u093f\u0930\u093e\u092f\u093e \u0926\u093f\u092f\u093e ?<\/strong> \n \n\u0939\u0932 :<\/strong>\u00a0a = 122 m, b = 22 m \u0914\u0930 c = 120 m \n <\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924\u00a0Q3. \u0915\u093f\u0938\u0940 \u092a\u093e\u0930\u094d\u0915 \u092e\u0947\u0902 \u090f\u0915 \u092b\u093f\u0938\u0932 \u092a\u091f\u094d\u091f\u0940\u00a0<\/strong>(slide)<\/strong>\u00a0\u092c\u0928\u0940 \u0939\u0941\u0908 \u0939\u0948\u0964 \u0907\u0938\u0915\u0940 \u092a\u093e\u0930\u094d\u0936\u094d\u0935\u0940\u092f \u0926\u0940\u0935\u093e\u0930\u094b\u0902\u00a0<\/strong>(side walls)\u00a0<\/strong>\u092e\u0947\u0902 \u0938\u0947 \u090f\u0915 \u0926\u0940\u0935\u093e\u0930 \u092a\u0930 \u0915\u093f\u0938\u0940 \u0930\u0902\u0917 \u0938\u0947 \u092a\u0947\u0902\u091f \u0915\u093f\u092f\u093e \u0917\u092f\u093e \u0939\u0948 \u0914\u0930 \u0909\u0938 \u092a\u0930 “\u092a\u093e\u0930\u094d\u0915 \u0915\u094b \u0939\u0930\u093e-\u092d\u0930\u093e \u0914\u0930 \u0938\u093e\u092b \u0930\u0916\u093f\u090f” \u0932\u093f\u0916\u093e \u0939\u0941\u0906 \u0939\u0948 \u0964 \u092f\u0926\u093f \u0907\u0938 \u0926\u0940\u0935\u093e\u0930 \u0915\u0940 \u0935\u093f\u092e\u093e\u090f\u0901 15m<\/strong>, 11m \u0914\u0930 6m \u0939\u0948\u0902, \u0924\u094b \u0930\u0902\u0917 \u0938\u0947 \u092a\u0947\u0902\u091f \u0939\u0941\u090f \u092d\u093e\u0917 \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n <\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924\u00a0Q4. \u0909\u0938 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f \u091c\u093f\u0938\u0915\u0940 \u0926\u094b \u092d\u0941\u091c\u093e\u090f\u0901 18 cm \u0914\u0930 10 cm \u0939\u0948\u0902 \u0924\u0925\u093e \u0909\u0938\u0915\u093e \u092a\u0930\u093f\u092e\u093e\u092a 42 cm \u0939\u0948\u0964<\/strong> \n\u0939\u0932 :<\/strong> \na = 18 cm, b = 10 cm \u0914\u0930 c = ? \n\u092a\u0930\u093f\u092e\u093e\u092a = 42 cm \na + b + c = 42 \n\u092f\u093e\u00a018 + 10 + c = 42 \n\u092f\u093e\u00a0c = 42 – 28 \n\u092f\u093e\u00a0c = 14 cm \n <\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924\u00a0Q5. \u090f\u0915 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u0940 \u092d\u0941\u091c\u093e\u0913\u0902 \u0915\u093e \u0905\u0928\u0941\u092a\u093e\u0924 12: 17: 25 \u0939\u0948 \u0914\u0930 \u0909\u0938\u0915\u093e \u092a\u0930\u093f\u092e\u093e\u092a 540cm \u0939\u0948\u0964 \u0907\u0938 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n\u0939\u0932 :<\/strong> \n\u092e\u093e\u0928\u093e \u092d\u0941\u091c\u093e\u090f\u0901 a = 12x, b = 17x \u0914\u0930 c = 25x \u0939\u0948 | \n\u0905\u0924: a + b + c = 540 cm \n\u092f\u093e\u00a0 12x + 17x + 25x = 540 \n\u092f\u093e 54x = 540 \n \n <\/p>\nEx 12.1 Class 9 \u0917\u0923\u093f\u0924\u00a0Q6. \u090f\u0915 \u0938\u092e\u0926\u094d\u0935\u093f\u092c\u093e\u0939\u0941 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u093e \u092a\u0930\u093f\u092e\u093e\u092a 30 cm \u0939\u0948 \u0914\u0930 \u0909\u0938\u0915\u0940 \u092c\u0930\u093e\u092c\u0930 \u092d\u0941\u091c\u093e\u090f\u0901 12 cm \u0932\u092e\u094d\u092c\u093e\u0908 \u0915\u0940 \u0939\u0948\u0902\u0964 \u0907\u0938 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n\u0939\u0932 :<\/strong> \n\u0926\u093f\u092f\u093e \u0939\u0948 : a = 12 cm, b = 12 cm \u0914\u0930 c = ? \n\u0905\u0924: a + b + c = 30 cm \n\u092f\u093e\u00a0 12 + 12 + c = 30 cm \n\u092f\u093e\u00a0 c = 30 – 24 cm \n\u092f\u093e\u00a0 c = 6 cm \n <\/p>\n\u092a\u094d\u0930\u0936\u094d\u0928\u093e\u0935\u0932\u0940 12.2<\/strong><\/span><\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924 Q1. \u090f\u0915 \u092a\u093e\u0930\u094d\u0915 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c <\/strong>ABCD<\/strong>\u00a0\u0915\u0947 \u0906\u0915\u093e\u0930 \u0915\u093e \u0939\u0948<\/strong>, \u091c\u093f\u0938\u092e\u0947\u0902\u00a0<\/strong>\u2220C = 90<\/strong>\u00b0<\/strong>, AB = 9 m, BC = 12 m, CD = 5 m<\/strong>\u00a0\u0914\u0930\u00a0<\/strong>AD = 8 m<\/strong>\u00a0\u0939\u0948\u0964 \u0907\u0938 \u092a\u093e\u0930\u094d\u0915 \u0915\u093e \u0915\u093f\u0924\u0928\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u0939\u0948<\/strong>?<\/strong> \n \n\u0939\u0932 :\u00a0<\/strong> \n \n \n= 65.04 m2<\/sup><\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q2. \u090f\u0915 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c\u00a0<\/strong>ABCD<\/strong>\u00a0\u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f<\/strong>, \u091c\u093f\u0938\u092e\u0947\u0902 AB = 3 cm, BC = 4 cm, CD = 4 cm, DA = 5 cm \u0914\u0930 AC = 5 cm \u0939\u0948\u0964<\/strong> \n \n\u0939\u0932 :<\/strong> \n \n \n \n\u0905\u0924: \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c ABCD \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 =\u00a0\u0394ABC \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 +\u00a0\u0394ACD \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \n= 7 cm2<\/sup>\u00a0+ 9.166 cm2\u00a0<\/sup>= 15.2 cm2<\/sup>\u00a0(Aprox)<\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q3. \u0930\u093e\u0927\u093e \u0928\u0947 \u090f\u0915 \u0930\u0902\u0917\u0940\u0928 \u0915\u093e\u0917\u091c \u0938\u0947 \u090f\u0915 \u0939\u0935\u093e\u0908\u091c\u0939\u093e\u091c \u0915\u093e \u091a\u093f\u0924\u094d\u0930 \u092c\u0928\u093e\u092f\u093e<\/strong>, \u091c\u0948\u0938\u093e \u0915\u093f \u0906\u0915\u0943\u0924\u093f 12.15 \u092e\u0947\u0902\u00a0<\/strong>\u0926\u093f\u0916\u093e\u092f\u093e \u0917\u092f\u093e \u0939\u0948\u0964 \u092a\u094d\u0930\u092f\u094b\u0917 \u0915\u093f\u090f \u0917\u090f \u0915\u093e\u0917\u091c \u0915\u093e \u0915\u0941\u0932 \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n \n\u0939\u0932 :<\/strong> \n \n \n \n\u0939\u0935\u093e\u0908 \u091c\u0939\u093e\u091c \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 = 2.49 cm2<\/sup>\u00a0+ 6.5 cm2<\/sup>\u00a0+ 1.68 cm2<\/sup>\u00a0+ 4.5 cm2<\/sup>\u00a0+ 4.5 cm2<\/sup> \n= 19.67 cm2<\/sup> \n\u0905\u0924: \u0939\u0935\u093e\u0908 \u091c\u0939\u093e\u091c \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 19.67 cm2\u00a0<\/sup>\u0939\u0948 \u0964<\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q4. \u090f\u0915 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0914\u0930 \u090f\u0915 \u0938\u092e\u093e\u0902\u0924\u0930 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c \u0915\u093e \u090f\u0915 \u0939\u0940 \u0906\u0927\u0930 \u0939\u0948 \u0914\u0930 \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u092d\u0940 \u090f\u0915 \u0939\u0940 \u0939\u0948\u0964 \u092f\u0926\u093f \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0915\u0940 \u092d\u0941\u091c\u093e\u090f\u0901 26 cm<\/strong>, 28 cm \u0914\u0930 30 cm \u0939\u0948\u0902 \u0924\u0925\u093e \u0938\u092e\u093e\u0902\u0924\u0930 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c 28 cm \u0915\u0947\u00a0<\/strong>\u0906\u0927\u0930 \u092a\u0930 \u0938\u094d\u0925\u093f\u0924 \u0939\u0948, \u0924\u094b \u0909\u0938\u0915\u0940 \u0938\u0902\u0917\u0924 \u090a\u0901\u091a\u093e\u0908 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n \n\u0939\u0932 :<\/strong> \n \n \n\u0905\u092c \u091a\u0942\u0901\u0915\u093f \u0938\u092e\u093e\u0902\u0924\u0930 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c BCDE \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932\u00a0\u0394ABC \u0915\u0947 \u092c\u0930\u093e\u092c\u0930 \u0939\u0948 \u0964 \n\u0905\u0924: \u00a0\u0938\u092e\u093e\u0902\u0924\u0930 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c BCDE \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 = 336 cm2<\/sup> \n\u092f\u093e b \u00d7 h = 336 cm2<\/sup> \n\u092f\u093e 28 \u00d7 h = 336 cm2<\/sup><\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q5. \u090f\u0915 \u0938\u092e\u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c\u093e\u0915\u093e\u0930 \u0918\u093e\u0938 \u0915\u0947 \u0916\u0947\u0924 \u092e\u0947\u0902 18 \u0917\u093e\u092f\u094b\u0902 \u0915\u0947 \u091a\u0930\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f \u0918\u093e\u0938 \u0939\u0948\u0964 \u092f\u0926\u093f \u0907\u0938 \u0938\u092e\u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c \u0915\u0940 \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u092d\u0941\u091c\u093e 30 m \u0939\u0948 \u0914\u0930 \u092c\u0921\u093c\u093e \u0935\u093f\u0915\u0930\u094d\u0923 48m \u0939\u0948<\/strong>, \u0924\u094b \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0917\u093e\u092f \u0915\u094b \u091a\u0930\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f \u0907\u0938 \u0918\u093e\u0938 \u0915\u0947 \u0916\u0947\u0924 \u0915\u093e \u0915\u093f\u0924\u0928\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u092a\u094d\u0930\u093e\u092a\u094d\u0924 \u0939\u094b\u0917\u093e?<\/strong> \n \n\u0939\u0932 :\u00a0<\/strong> \n <\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q6. \u0926\u094b \u0935\u093f\u092d\u093f\u0928\u094d\u0928 \u0930\u0902\u0917\u094b\u0902 \u0915\u0947 \u0915\u092a\u0921\u093c\u094b\u0902 \u0915\u0947 10 \u0924\u094d\u0930\u093f\u092d\u0941\u091c\u093e\u0915\u093e\u0930 \u091f\u0941\u0915\u0921\u093c\u094b\u0902 \u0915\u094b \u0938\u0940\u0915\u0930 \u090f\u0915 \u091b\u093e\u0924\u093e \u092c\u0928\u093e\u092f\u093e \u0917\u092f\u093e \u0939\u0948\u00a0<\/strong>(\u0926\u0947\u0916\u093f\u090f \u0906\u0915\u0943\u0924\u093f 12.16)\u0964 \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u091f\u0941\u0915\u0921\u093c\u0947 \u0915\u0947 \u092e\u093e\u092a 20 cm<\/strong>, 50 cm \u0914\u0930 50 cm \u0939\u0948\u0902\u0964 \u091b\u093e\u0924\u0947 \u092e\u0947\u0902\u00a0<\/strong>\u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0930\u0902\u0917 \u0915\u093e \u0915\u093f\u0924\u0928\u093e \u0915\u092a\u0921\u093c\u093e \u0932\u0917\u093e \u0939\u0948<\/strong>? \n \n\u0939\u0932 :\u00a0<\/strong> \n <\/strong><\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q7. \u090f\u0915 \u092a\u0924\u0902\u0917 \u0924\u0940\u0928 \u092d\u093f\u0928\u094d\u0928-\u092d\u093f\u0928\u094d\u0928 \u0936\u0947\u0921\u094b\u0902\u00a0<\/strong>(shades)\u00a0<\/strong>\u0915\u0947 \u0915\u093e\u0917\u091c\u094b\u0902 \u0938\u0947 \u092c\u0928\u0940 \u0939\u0948\u0964 \u0907\u0928\u094d\u0939\u0947\u0902 \u0906\u0915\u0943\u0924\u093f 12.17 \u092e\u0947\u0902\u00a0<\/strong>I, II<\/strong>\u00a0\u0914\u0930\u00a0<\/strong>III\u00a0<\/strong>\u0938\u0947 \u0926\u0930\u094d\u0936\u093e\u092f\u093e \u0917\u092f\u093e \u0939\u0948\u0964 \u092a\u0924\u0902\u0917 \u0915\u093e \u090a\u092a\u0930\u0940 \u092d\u093e\u0917 32 cm \u0935\u093f\u0915\u0930\u094d\u0923 \u0915\u093e \u090f\u0915 \u0935\u0930\u094d\u0917 \u0939\u0948 \u0914\u0930\u00a0<\/strong>\u0928\u093f\u091a\u0932\u093e \u092d\u093e\u0917 6 cm<\/strong>, 6 cm \u0914\u0930 8 cm \u092d\u0941\u091c\u093e\u0913\u0902 \u0915\u093e \u090f\u0915 \u0938\u092e\u0926\u094d\u0935\u093f\u092c\u093e\u0939\u0941 \u0924\u094d\u0930\u093f\u092d\u0941\u091c \u0939\u0948\u0964 \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u00a0<\/strong>\u0915\u093f \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0936\u0947\u0921 \u0915\u093e \u0915\u093f\u0924\u0928\u093e \u0915\u093e\u0917\u091c \u092a\u094d\u0930\u092f\u0941\u0915\u094d\u0924 \u0915\u093f\u092f\u093e \u0917\u092f\u093e \u0939\u0948\u0964<\/strong> \n \n\u0939\u0932 :\u00a0<\/strong> \n \n\u092d\u093e\u0917 I \u0915\u093e \u0915\u094d\u0937\u0947\u0966 = 256 cm2<\/sup> \n\u092d\u093e\u0917 II \u0915\u093e \u0915\u094d\u0937\u0947\u0966 = 256 cm2<\/sup> \n\u092d\u093e\u0917 III \u0915\u093e \u0915\u094d\u0937\u0947\u0966 = 17.92 cm2<\/sup><\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q<\/strong>8. \u092b\u0930\u094d\u0936 \u092a\u0930 \u090f\u0915 \u092b\u0942\u0932\u094b\u0902 \u0915\u093e \u0921\u093f\u091c\u093c\u093e\u0907\u0928 16 \u0924\u094d\u0930\u093f\u092d\u0941\u091c\u093e\u0915\u093e\u0930<\/strong>\u00a0\u091f\u093e\u0907\u0932\u094b\u0902 \u0938\u0947 \u092c\u0928\u093e\u092f\u093e \u0917\u092f\u093e \u0939\u0948<\/strong>,\u00a0<\/strong>\u091c\u093f\u0928\u092e\u0947\u0902 \u0938\u0947 \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0915\u0940 \u092d\u0941\u091c\u093e\u090f\u0901<\/strong>\u00a09 cm<\/strong>,\u00a0<\/strong>28 cm \u0914\u0930 35 cm \u0939\u0948\u0902\u00a0<\/strong>(<\/strong>\u0926\u0947\u0916\u093f\u090f \u0906\u0915\u0943\u0924\u093f 12.18)\u0964 \u0907\u0928 \u091f\u093e\u0907\u0932\u094b\u0902 \u0915\u094b 50 \u092a\u0948\u0938\u0947 \u092a\u094d\u0930\u0924\u093f cm2<\/sup>\u00a0\u0915\u0940 \u0926\u0930<\/strong>\u00a0\u0938\u0947 \u092a\u093e\u0932\u093f\u0936 \u0915\u0930\u093e\u0928\u0947 \u0915\u093e \u0935\u094d\u092f\u092f \u091c\u094d\u091e\u093e\u0924 \u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n \n\u0939\u0932 :<\/strong> \n \n= 36 \u00d7 2.45 = 88.2 cm2<\/sup> \n\u0905\u0924: \u0907\u0928 \u0938\u092d\u0940 16 \u091f\u093e\u0907\u0932\u094d\u0938 \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 = 88.2 \u00d7 16 \n= 1411.2 cm2<\/sup> \n\u091f\u093e\u0907\u0932\u094b\u0902 \u092a\u0930 \u092a\u0949\u0932\u093f\u0936 \u0915\u0930\u093e\u0928\u0947 \u0915\u093e \u0916\u0930\u094d\u091a = 1411.2 \u00d7 0.50 \n= 705.60 \u0930\u0941\u092a\u092f\u0947 \u0964<\/p>\nEx 12.2 Class 9 \u0917\u0923\u093f\u0924\u00a0Q9. \u090f\u0915 \u0916\u0947\u0924 \u0938\u092e\u0932\u0902\u092c \u0915\u0947 \u0906\u0915\u093e\u0930 \u0915\u093e \u0939\u0948 \u091c\u093f\u0938\u0915\u0940 \u0938\u092e\u093e\u0902\u0924\u0930<\/strong>\u00a0\u092d\u0941\u091c\u093e\u090f\u0901 25 m \u0914\u0930 10 m \u0939\u0948\u0902\u0964 \u0907\u0938\u0915\u0940 \u0905\u0938\u092e\u093e\u0902\u0924\u0930 \u092d\u0941\u091c\u093e\u090f\u0901<\/strong>\u00a014 m \u0914\u0930 13 m \u0939\u0948\u0902\u0964 \u0907\u0938 \u0916\u0947\u0924 \u0915\u093e \u0915\u094d\u0937\u0947\u0924\u094d\u0930\u092b\u0932 \u091c\u094d\u091e\u093e\u0924<\/strong>\u00a0\u0915\u0940\u091c\u093f\u090f\u0964<\/strong> \n \n\u0939\u0932 :\u00a0<\/strong> \nAB \u0915\u0947 \u092c\u0930\u093e\u092c\u0930 \u092d\u0941\u091c\u093e BC \u092a\u0930 DE \u0915\u093e\u091f\u093e \n\u0905\u0924: DE = 10 m \n\u0907\u0938\u0932\u093f\u090f, EC = DC – DE \n= 25 – 10 = 15 m \n\u0905\u092c \u091a\u0942\u0901\u0915\u093f AB = DE \u0939\u0948 \u0914\u0930 AB || DE \u0907\u0938\u0932\u093f\u090f ABED \u090f\u0915 \u0938\u092e\u093e\u0902\u0924\u0930 \u091a\u0924\u0941\u0930\u094d\u092d\u0941\u091c \u0939\u0948 | \n\u0905\u0924: AD = BE = 14 m \nDBCE \u092e\u0947\u0902, \na = 14 m, b = 15 m \u0914\u0930 c = 13 m \n \n <\/p>\nHope given\u00a0NCERT Solutions for Class 9 Maths Chapter 12 are helpful to complete your homework.<\/p>\n","protected":false},"excerpt":{"rendered":"
NCERT Solutions for Class 9 Maths Chapter 12 Heron\u2019s Formula (\u0939\u0940\u0930\u094b\u0928 \u0938\u0942\u0924\u094d\u0930) (Hindi Medium) These Solutions are part of\u00a0NCERT Solutions for Class 9 Maths in Hindi Medium. Here we have given NCERT Solutions for Class 9 Maths Chapter 12 Heron’s Formula. \u092a\u094d\u0930\u0936\u094d\u0928\u093e\u0935\u0932\u0940 12.1 Ex 12.1 Class 9 \u0917\u0923\u093f\u0924 Q1. \u090f\u0915 \u092f\u093e\u0924\u093e\u092f\u093e\u0924 \u0938\u0902\u0915\u0947\u0924 \u092c\u094b\u0930\u094d\u0921 \u092a\u0930 \u2018\u0906\u0917\u0947 …<\/p>\n
NCERT Solutions for Class 9 Maths Chapter 12 Heron\u2019s Formula (Hindi Medium)<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":7731,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[6],"tags":[27,26,28,24,25],"yoast_head":"\nNCERT Solutions for Class 9 Maths Chapter 12 Heron\u2019s Formula (Hindi Medium) - MCQ Questions<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n \n \n \n \n\t \n\t \n\t \n