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Answer:
100 + 40 + 40 + 40 + 40
Explanation:
area of base = 10 x 10 = 100 square units
area of each triangular side = 0.5 x 10 x 8 = 40 square units.
Total area = 1 base + 4 sides
= 100 + 40 + 40 + 40 + 40
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