Don't tell me how to do it because i know the concept sorta, but i always get the wrong answer, are you able to tell me the answer and tell me how you got it? anyone? (pic included)

Match the one-to-one functions with their inverse functions.

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.

Can someone me on this math worksheet about finding the given variable for these angles, and whether the triangles are similar. i really need these answers i’m so confused: ( !