Question

The Two sides of a rectangle are 15 cm. and 20 cm. Find the length of its diagonal

Answer 1

by Pythagoras theorem
h sq =p sq + b sq
h^2=15^2+20^2
h^2=225+400
h=√625
h=25 cm
diagonal=25 cm

Answer 2

let the diagonals be x

By Pythagoras theorem,

20² + 15² = x²
400+ 225 = x²
x² = 625 = 25²
x = 25

Therefore the length of the diagonal is 25cm