In circle O shown below, chords PQ and RS intersect at such that PT = 8 and PQ = 22 If ST = 4 , then which of the following is the length of RT? 1.) 11
2.) 18
3.) 44
4.) 28

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.