Question

The diagram shows a square with side length 5cm.

The length of the diagonal is y cm.
Find the exact value of y.

Answer 1

5sqrt2

Explanation:

Using the pythagorean theorem, we get 5^2+5^2=c^2. C is the diagonal here. 25+25=c^2, c^2=50. c=sqrt50. Simplifying it, we get the diagonal as 5sqrt2.