Question

99 points for brainliest

Answer 1

Answer:

144

Step-by-step explanation:

SA = Area of base + 4 area of triangles

6² + 4(9 × 6 × 1/2)

36 + 4(27)

= 144

Answer 2

Answer:

144

Step-by-step explanation:

4 triangles = 1/2 x 6 x 9 x 4 = 108

1 sq base = 6 x 6 = 36

total surface area = 36 + 108 = 144

if 3 triangles the base wouldn't be a square thus not possible to solve