A regular hexagon has a radius of 20 in. What is the approximate area of the hexagon? 600 in.2 1,038 in.2 1,200 in.2 2,076 in.2

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.