Question

Find the lenght of the hypontenuse of a right triangle with legs of 9 cm and 12 cm.

(a) 8 cm
(b) 21 cm
(c) 15 cm
(d) 225 cm

Answer 1

The length of the hypotenuse is C. 15.

Explanation:

Use the Pythagorean theorem. a^2 + b^2 = c^2

9^2 = 81

12^2 = 144

81 + 144 = 225

The square root of 225 is 15; 15^2.