Find the measure of one exterior angle in each regular polygon. Round your answer to the nearest tenth if necessary.

3)

O 45°

0277

51.4

072

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.