2. 外语
  3. In the figure below, line n is parallel to line m, and line p is parallel to line o. What is the measure of angle a?

In the figure below, line n is parallel to line m, and line p is parallel to line o. What is the measure of angle a?

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问题 In the figure below, line n is parallel to line m, and line p is parallel to line o. What is the measure of angle a?
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答案90°
解析 The answer is 90°. You are given that the angle formed by the intersection of line p and line n is a right angle, which is 90°. Since line o is parallel to line p, it will make the same angles as any line crossing line p. The same rule applies to line m and line n. Therefore, all of the angles on the diagram are equal to 90°.
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