PLEASE HELP ME! 10 POINTS!
FIND THE SURFACE AREA!

Answer:
972 m²
Step-by-step explanation:
first area(square base)= 18²=324
all four triangles have the same area
area(triangle)= (1/2)(base)(height)
(1/2)(18)(18)=162
times 4 triangles
4(162)=648
add square base
=972