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?
- The area of the circle is 16π square centimeters.
- 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：
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
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