# Chapter 6 - Section 6.5 - Congruent and Similar Triangles - Exercise Set - Page 452: 21

The missing length is 17.5 units

#### Work Step by Step

$\frac{x}{3.25}$=$\frac{17.5}{3.25}$ set cross products equal 3.25x=3.25$\times$17.5 3.25x = 56.875 $\frac{3.25x}{3.25}$=$\frac{56.875}{3.25}$ divide by 3.25 both sides x=$\frac{5687.5}{325}$ x=17.5 The missing length is 17.5 units

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