Solutions to Chapter Problems

Chapter 15 Measurement A Focus on Length and Area

(p. 363):

9 cm, 12 cm, and 15 cm
That’s because 9 × 12 = 2 × 54 = 108.
The hypotenuse is √9² + 12²= √ 225 = 15.
The perimeter is 9 + 12 + 15 = 36 cm.