6.1 Angles and Their Measure/51

Failed to parse (syntax error): {\displaystyle \frac{\pi}{2}\cdot\frac{180^{\circ}}{\pi}=\frac{/cdot \cancel{2} /cdot 2 \cdot 3 \cdot3 \cdot 3}}{2} = \frac{2\pi}{\pi} }