Easy
In a right triangle, the two legs measure 9 cm and 12 cm. Find the length of the hypotenuse.
Explanation
Explanation
By the Pythagoras theorem, (hypotenuse)² = (leg₁)² + (leg₂)². Here 9² + 12² = 81 + 144 = 225 = 15², confirming the sides 9, 12, 15 form a right triangle so the hypotenuse is 15 cm.
PRO TIP
Re-check your working by substituting the answer back into the original question.