A square pyramid is shown. What is the surface area?

This figure has a square base and 4 triangular sides....

the square has area 1.5 x 1.5 = 2.25 cm^2

The triangles(four) 4 * 1/2 b x h = 4 * 1/2 *1.5 *3 =9

Total = 2.25 + 9 = 11.25 cm^2