Find the surface area of the pyramid. The side lengths of the base are equal
11.4 yd
6 yd
The surface area is
square yards

Just tell me how to set up the equation.

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Pls the last one and it has to be like number 6