Answer: 260 square inches
Answer:
Explanation:
Surface area of the 4 sided pyramid = base area + 4 time each triangle area
= (s²) + 4 × 1/2(b)(h)
= (10)(10) + 4 × (1/2)(10)(8)
= 100 + 4(1/2)(10)(8)
= 100 + 160
= 260
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