看图填空:如下图左,∠A+∠D=180°(已知)∴______∥______ (______)∴∠1=____
看图填空:如下图左,∠A+∠D=180°(已知)∴______∥______ (______)∴∠1=____
看图填空:(1)看图1,完成证明:∵∠A+∠D=180°(已知)∴______∥______∴∠1=______∵∠1=
如图,填空: (1)∵∠1=∠A(已知)∴______(______ );(2)∵∠2=∠B(已知)∴____
几何推理,看图填空:(1)∵∠3=∠4(已知)∴______∥______(______)(2)∵∠DBE=∠CAB(已
如图,已知直线a∥b,c∥d,∠1=115°,则∠2=______度,∠3=______度.
如图,填空: (1)由∠ABD=∠CDB得______∥______(2)由∠CAD=∠ACB得______∥_____
看图填空 (1)因为∠1=∠2(已知),所以______∥________( ) (2)因为_______=180°(已
看图填空:(1)∵∠A=(∠BED )(已知)∴AC∥ED(______)(2)∵∠2=(∠CFD)(已知)∴AC∥DE
看图填空:(1)∠1和∠4是______角;(2)∠1和∠3是______角;(3)∠2和∠D是______角;(4)∠
如图,已知AB=DC,BE=CF,只要找出∠____=∠______或∠____=∠______,就可证的△_____全
看图填空: (1)∠ABC与______是同位角;(2)∠ADB与______是内错角;(3)∠ABC与______是同
如图,根据图形填空: (1)AD是△ABC中∠BAC的角平分线,则∠______=∠______=12