Question

Can someone explain to me how to figure this out?

Find the surface area of the regular pyramid shown to the nearest whole number. The figure is not drawn to scale.
A. 862 m²
B. 540 m²
C. 1,125 m²
D. 647 m²

Answer 1

Answer C
6 triangles around. 1/2bh=. 1/2 (15)(12)(6) triangles = 540

Bottom base formula 1/2 a p
1/2 (7.5 sq rt of 3)(15)(6)= 584.56
1,124.56
1,125