Im stuck please help Brainliest Write three equivalent ratios for each ratio. a) 5 to 6 b) 28:42 c) 3 4 :6 5 plz show work

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.