## Basic College Mathematics (10th Edition)

The missing length is $15$ cm.
1. Find the missing length using the Pythagorean Formula $a^{2} + b^{2} = c^{2}$ $c = \sqrt(a^{2} + b^{2})$ $c = \sqrt(9^{2} + 12^{2})$ $c = \sqrt (225)$ $c = 15$ cm