GRE考试

【单选题】In the figure above, m//n. Which of the angles are supplementary to ∠1

A、∠2
B、∠3
C、∠5
D、∠6
E、∠7
网考网参考答案：A、D
网考网解析：
Supplementary angles total 180°. ∠1 is adjacent to ∠2 and forms a straight line, so the two angles are supplementary. ∠1≌∠3 because they are corresponding angles. Since ∠6 is adjacent and supplementary to ∠3, it is also supplementary to ∠1. In this case, angles represented by B, C, and E are all congruent to ∠1. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>