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如图，a∥b，等边△ABC的顶点B在直线b上，∠1=20°，则∠2的度数为（ ）
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教案备课库《2017——2018学年度上学期八①年级期中模拟数学试题》真题及答案
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如图l∥m等边△ABC的顶点A.在直线m上则∠α=.
如图15//m等边△ABC的顶点A.在直线m上则∠α=
如图△ABC的三个顶点分别在直线ab上且a∥b若∠1=120°∠2=80°则∠3的度数是
40°
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如图分别过等边△ABC的顶点A.B.作直线ab使a∥b.若∠1=40°则∠2的度数为.
如图直线l∥m∥n等边△ABC的顶点B.C.分别在直线n和m上边BC与直线n所夹锐角为25°则∠α的
25°
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已知如图l∥m等边△ABC的顶点B.在直线m上边BC与直线m所夹锐角为20°则∠α的度数为
60°
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40°
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如图l∥m等边△ABC的顶点
B分别在直线l、m上，∠1=25°，则∠2=（ ）
A.35°
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55°
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如图直线m∥n△ABC的顶点B.C.分别在nm上且∠C.＝90°若∠1＝40°则∠2的度数为
130°
120°
110°
100°
如图△ABC的三个顶点分别在直线ab上且a∥b若∠1＝120°∠2＝80°则∠3的度数是
40°
60°
80°
120°
如图a∥b等边△ABC的顶点B.在直线b上∠1=20°则∠2的度数为
60°
45°
40°
30°
如图△ABC的三个顶点分别在直线ab上且a∥b若∠1＝120°∠2＝80°则∠3的度数是
40°
60°
80°
120°
在等边△ABC所在平面上的直线m满足的条件是等边△ABC的3个顶点到直线m的距离只取2个值其中一个
16
18
24
27
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140°
130°
120°
110°
如图直线m∥n△ABC的顶点B.C.分别在直线nm上且∠ACB=90°若∠1=40°则∠2的度数为
140°
130°
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如图PQ∥MN等边△ABC的顶点A在PQ上等边△CDE的顶点D在MN上且ACD在一条直线上当∠BAP
如图直线l∥m∥n等边△ABC的顶点B.C.分别在直线n和m上边BC与直线n所夹锐角为25°则∠α的
25°
45°
35°
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如图直线a∥b△ABC是等边三角形点A.在直线a上边BC在直线b上把△ABC沿BC方向平移BC的一半
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如图直线m∥n△ABC的顶点B.C.分别在直线nm上且∠ACB=90°若∠1=40°则∠2的度数为
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已知等边△ABC1如图1P.为等边△ABC外一点且∠BPC=120°.试猜想线段BPPCAP之间的数
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A.35° 45° 55° 75°
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