Practicing Success
The area of an isosceles right angled triangle is 121 cm2 . Find its hypotenuse |
23 cm 20 cm 22 cm 21 cm |
22 cm |
Area of triangle = \(\frac{1}{2}\)× base × height According to Pythagoreans theorem (Hypotenuse)2 = (Perpendicular)2 + (Base)2 Let the base and height of the isosceles triangle be ‘x’ Area of triangle = \(\frac{1}{2}\)× base × height = 121 = \(\frac{1}{2}\)× x × x = x2 = 242 = x = √242 = 11√2 We know that, (AC)2 = (AB)2 + (BC)2 = (AC)2 = (11√2)2 + (11√2)2 = (AC)2 = 242 + 242 = (AC)2 = 484 = AC = √484 = 22 cm |