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Vesnalui [34]
3 years ago
10

99 points for brainliest

Mathematics
2 answers:
Scorpion4ik [409]3 years ago
7 0

Answer:

144

Step-by-step explanation:

SA = Area of base + 4 area of triangles

6² + 4(9 × 6 × 1/2)

36 + 4(27)

= 144

Whitepunk [10]3 years ago
6 0

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

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