What is the area of this figure?

select from the drop-down menu to correctly complete the statement.
the area of the figure is

a)128
b)136
c)153
d)258

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.