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In the figure below, line x is parallel to line y. What is the measure of angle a?
In the figure below, line x is parallel to line y. What is the measure of angle a?
admin
2013-02-19
39
问题
In the figure below, line x is parallel to line y. What is the measure of angle a?
选项
答案
137°
解析
The answer is 137°. The transversal crosses two parallel lines, so the angles made at the intersections will be identical. 43° corresponds to the supplementary angle of a on line y. Since 43° and a are supplementary angles, they must add up to 180°. Therefore, the answer is 137°.
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