Find the area of the given figure. Round to the nearest tenth. 11.5 tt
16.6
10811
10
Select one:
O a. 48.9 ft?
Ob. 53.2 ft
O C. 138 ft
O d. 166 ft?

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.