1 Answer

Hoangdv · Answer 1 · 2021-01-12T10:41:14+0000

Answer:

105

For the 4 triangular faces, find the area with 1/2 × base × height = 1/2 × 5 × 8 = 20

4 triangles -> 20 × 4 = 80

The area of the square base is 25

80 + 25 - 105
cm^(2)

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