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| 1. |
The perimeter of right angle triangle is 60 CM its hypotenuse is 25 cm find the area of the triangle |
| Answer» Here,\xa0a + b + c = 60, c = 25a + b = 6 0 - ca + b = 6 0 - 2 5 = 35Using Pythagoras theorem|{tex}a ^ { 2 } + b ^ { 2 } = 625{/tex}\xa0Using identity\xa0{tex}( a + b ) ^ { 2 } = a ^ { 2 } + b ^ { 2 } + 2 a b{/tex}\xa0{tex}35 ^ { 2 } = 625 + 2 a b{/tex}\xa01225 - 625 = 2abor, ab = 300Hence, Area of\xa0{tex}\\triangle A B C = \\frac { 1 } { 2 } a b = 150 \\mathrm { cm } ^ { 2 }{/tex} | |