Can someone help and explain? Thank you have a good one.

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Write and solve a real word problem that involves determining distance on a coordinate plane

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.