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  3. The boundaries of regions X and Y are parallelograms.Column A

The boundaries of regions X and Y are parallelograms.Column A

游客2024-01-12  8
问题 The boundaries of regions X and Y are parallelograms.

Column A                                                  Column B
The area of X if its sides have lengths 6 and 10          The area of Y if its sides have lengths 5 and 12
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案 D
解析 X和Y是平行四边形。
解：本题的正确答案为(D)。比较的左项为边长分别是6和10的平行四边形X的面积；比较的右项为边长分别是5和12的平行四边形Y的面积。平行四边形公式为：S=a×b sinθ，θ为a和b的夹角，因而仅仅a×b乘积相等并不能表明他们的面积相等，面积的大小还受a和b的夹角大小的制约。
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