Question

Find the length of hypotenuse of a right triangle the other two sides of which measure 9cm and 12cm.

Answer 1

Apply the Pythagoras theorem,
In a right angled triangle,
l^2 + b^2 = h^2
9^2 + 12^2 = h^2
i.e. h= 15 cm.
Thus, Hypotenuse = 15 cm.

Answer 2

by Pythagoras theorem
a^2+b^2 = c^2

a = 9cm. b = 12cm
9^2 + 12^2 = 225
= 15^2

therefore the third side means the hypotenuse is equal to 15cm.