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△RST lies in the XY-plane and points R and T have (x, y) coordinates (0,0) and (6,0) , respectively. The area of △RST is 12. Co
△RST lies in the XY-plane and points R and T have (x, y) coordinates (0,0) and (6,0) , respectively. The area of △RST is 12. Co
admin
2009-05-19
138
问题
△RST lies in the XY-plane and points R and T have (x, y) coordinates (0,0) and (6,0) , respectively. The area of △RST is 12.
Column A Column B
The x-coordinate of R The y-coordinate of S
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
△RST位于XY坐标平面中,顶点R和T的坐标(coordinate)分别是(0,0)和(6,0)。△RST的面积为12。
解:本题的正确答案是(D)。由△RST的面积为12,RT长度为6,可以推出S点的纵坐标为±4,而横坐标则为直线y=+4和y=-4上的任一点,所以本题为无法判断。
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