6.1 Angles and Their Measure/45

Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle 90^{\circ }\cdot {\frac {\pi }{180^{\circ }}}={\frac {{\cancel {2}}\cdot {\cancel {3}}\cdot {\cancel {3}}\cdot {\cancel {5}}}{1}}\cdot {\frac {\pi }{{2}\cdot {\cancel {2}}\cdot {\cancel {5}}\cdot {\cancel {3}}{\cancel {\cdot }}3}}={\frac {2\pi }{3}}}