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?

选项

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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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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GRE

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AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

Inarightisoscelestriangle,thelengthsofthetwononhypotenusesidesaredesignateda.Whatistheareaofthetrianglein

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