Q19: In the xy-plane, the sides of a certain rectangle are parallel to the axes. If one of the vertices of the rectangle is (-1,-2), what is the perimeter of the rectangle? (1) One of the vertices of the rectangle is (2, -2). (2) One of the vertices of the rectangle is (2, 3). 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. Answer: B (GWD:11) 脑子有点转不过来了。。如何解？ -- by 会员 adasuying2004 (2011/5/30 1:19:40)
(1) If one of the vertices of the rectangle is (-1,-2), One of the vertices of the rectangle is (2, -2).
y轴坐标都是-2 所以指知道一边的长度为3
(2) If one of the vertices of the rectangle is (-1,-2), One of the vertices of the rectangle is (2, 3).
因为题目已知长方形的边与xy轴平行 所以与x轴平行的边得长度为 1+2=3 与y轴平行的边得长度为2+3=5
楼主其实你一画图就明白了 有时候提做多了都会晕的 我现在看见阅读感觉脑子都不转了 哎 | 
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发表于 2011-5-30 01:19:40
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