# Chapter 4 - Mid-Chapter Check Point - Page 577: 4

$-117^o$

#### Work Step by Step

Multiply $\dfrac{180^o}{\pi}$ to the given angle measure to obtain: $=-\dfrac{13\pi}{20} \cdot \dfrac{180^o}{\pi} \\=-\dfrac{2340^o(\pi)}{20\pi} \\=-117^o$

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