Question

The area of a square garden is 200 m^2. how long is the diagonal?

Answer 1

area of square = side^2

side = root(area) = root(200m^2) = 10root2 m

using pythagoras theorem

(diagonal)^2 = (10root2)^2 + (10root2)^2
= 200 + 200
diagonal = root400
= 20 m