Question

SAT数学题求翻译解答

In the semicircle above, the center is at (4.0). Which of the following are x-coordinates of two points on this semicircle whose y-coordinates are equal?A 1 and 6 B 1 and 8 C 2 and 6 D 2 and 8 E 3 and 6
求翻译以及解答这道题 答案是C
http://zhidao.baidu.com/question/572202299?quesup2&oldq=1顺便求这道题原题

Answer 1

在上面的半圆,中心是在(4.0)。下列哪些是x坐标的两个点在这个半圆的y坐标是平等的吗?
选c
画图就知道了，坐标轴上0,1,2,3,4,5,6,7,8,
4是中心，那么0和8到4的距离相等，那么1和7到4的距离相等，同理2和6，3和5