The tells how fast a line rises or falls between any two points on that line. algebraically it is expressed as (y2 - y1)/ (x2 - x1) for the line p

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.