6.1 Angles and Their Measure/51

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