题库搜索>数据充分DS-15092
The base of the roof of a building has a pentagonal shape. The roof is constructed as a regular pyramid with a pentagon as its base. What is the total area of the lateral segments of the roof?
(1) The base of the pyramid has a perimeter of 30 meters.
(2) The faces of the pyramid are equal triangles.
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429021fl
equal triangles是说相同的三角形，等边三角形是equilateral triangle，需要分清
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2021-12-06 15:27:03
403045wqua回复429021fl
嗯呢！
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2022-08-03 11:27:33
388436tgzn
屋子的底部是个五边形，以五边形为底建立一个正棱锥，问屋子的侧面积是多少 条件1：底部周长为30，可以得到每一个边为5，也就是侧面的底为5，不知道高不能求 条件2：5个侧面全等，相当于废话
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2021-11-22 11:27:25
174634p
题没看懂，还是需要积累词汇
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2021-11-16 17:48:11
Monicayi
条件1显然不行； 条件2：The faces of the pyramid are equal triangles.应该是说正五棱锥的每个侧面是全等的……（不是每个面是等边三角形）这样条件2就是废话了……
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2021-08-25 15:19:44
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