Question

The square of a diagonal of a square is 128 sq cm. Find the side of the square

Answer 1

I hope the answer is clear .

Answer 2

${x}^{2} + {x}^{2} = 128$

$2 {x}^{2} = 128$

$\pink{{x}^{2} = \frac{128}{2} }$

$\purple{ {x}^{2} = 64}$

$\green{x = \sqrt{64} }$

$\blue{x = 8}$

so one side = 8 cm