For the following right triangle find the side length x Solu

For the following right triangle, find the side length x.

Solution

applying pythagorean theorem on the right angled triangle

sum of squares of two sides = square of hypotenuse

therefore,

9^2 + 12^2 = x^2

81 + 144 = x^2

225 = x^2

taking square root on both sides

sqrt 225 = sqrt x^2

x = 15