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如图，直线a∥b，∠1＝60°，∠2＝40°，则∠3等于（ ）
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如图直线l1∥l2∠1＝40°∠2＝75°则∠3等于
55°
60°
65°
70°
如图直线ab相交于点O.若∠1等于40°则∠2等于.
50°
60°
140°
160°
如图已知直线a∥b∠1=40°∠2=60°.则∠3等于
100°
60°
40°
20°
如图已知直线a∥b∠1=40°∠2=60°.则∠3等于.
100°
60°
40°
20°
如图直线ab相交于点O.若∠1等于40°则∠2等于
50°
60°
140°
160°
如图直线ab被直线c所截a∥b∠1=∠2若∠3=40°则∠4等于
40°
50°
70°
80°
如图右AB∥CD直线HE⊥MN交MN于E.∠1=130º则∠2等于
50º
40º
30º
60°
如图直线a∥b∠1=120°∠2=40°则∠3等于
60
0
70
0
80
0
90
0
如图直线ab被直线c所截a∥b∠1=∠2若∠3=40°则∠4等于
）40° （
）50° （
）70° （
）80°
如图已知直线a∥b∠1=40°∠2=60°则∠3等于
100°
60°
40°
20°
如图直线l1∥l2∠1＝40°∠2＝75°则∠3等于
60°
65°
70°
85°
如图已知直线∥∠1＝40°∠2＝60°.则∠3等于.
100°
60°
40°
20°
如图6已知直线a∥b∠1=40°∠2=60°则∠3等于
100°
60°
40°
20°
如图直线ab相交于点O.若∠1等于40°则∠2等于
50°
60°
140°
160°
如图直线abcd已知c⊥ac⊥b直线bcd交于一点若∠1=50°则∠2等于
60°
50
40°
30°
.如图直线ab被直线c所截a∥b∠1＝∠2若∠3＝40°则∠4等于
40°
50°
70°
80°
如图直线ab被直线c所截a∥b∠1＝∠2若∠3＝40°则∠4等于
40°
50°
70°
80°
如图直线l1∥l2∠1=40°∠2=75°则∠3等于
55°
60°
65°
70°
如图直线l1∥l2∠1=40°∠2=75°则∠3等于
）55° （
） 60°
（
）65° （
） 70°
如图直线a∥b∠1=60°∠2=40°则∠3等于
40°.
60°.
80°.
100°.
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