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[Data Sufficiency]

试题详情

题目:

A pentagon with 5 sides of equal length and 5 interior angles of equal measure is inscribed in a circle. Is the perimeter of the pentagon greater than 26 centimeters?
  1. The area of the circle is 16π square centimeters.
  2. The length of each diagonal of the pentagon is less than 8 centimeters.

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

D

提问:

想问下第二个statement怎么判断的 麻烦徐小梅老师回答下! 谢谢老师

解答:

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解答: 徐小梅

提问:

听了讲解以后有一点不理解的:条件2只是给定了对角线小于8这一范围但没有给定具体值 在不会计算具体值的情况下该怎么确定对角线小于8的所有情况都能得出唯一答案(大于26 等于26 或小于26)呢?是否需要学习圆内接多边形周长的计算呢?请may老师回答

解答:

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解答: 徐小梅老师

提问:

请问徐小梅老师,条件二如何通过对角线的长度来求正五边形的周长呢?

解答:

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阅读3041
解答: 徐小梅老师

提问:

想问下第二个statement怎么判断的 麻烦徐小梅老师回答下! 谢谢老师

解答:

点赞1
阅读3948
解答: 徐小梅老师

提问:

369.OG 解析里面那个d=s+_那个式子是怎么来的?另外正五边形(本题是正五边形?)对角线一定三等分某个内角吗?感觉这题好难....

解答:

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阅读4008
解答: 陆旭老师

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