配套习题- 运用分类讨论思想求等腰三角形的角度问题 -【青果学院】

1/5单选题

难度：

1.等腰三角形一个内角是80°，则另两个角的度数分别是（　　）

A	80°；20°
B	50°；50°或80°；20°
C	50°；50°
D	20°；100°

正确答案：Qg==

PGRpdj4xLiDoi6XnrYnohbDkuInop5LlvaLnmoTpobbop5LkuLo4MMKw5pe277yM5Y+m5aSW5Lik5Liq5YaF6KeSPGltZyB3aWR0aD05MiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9GQy9GQS9yQkFDRkZNSjBYZXlWWGg3QUFBQ0tnanoxcG83NzEucG5nIj7CsDwvZGl2PjxkaXY+Mi4g6Iul562J6IWw5LiJ6KeS5b2i55qE5bqV6KeS5Li6ODDCsOaXtu+8jOWug+eahOWPpuWkluS4gOS4quW6leinkuS4ujgwwrDvvIzpobbop5LkuLoxODDCsC04MMKwLTgwwrA9MjDCsDwvZGl2Pg==

2/5单选题

难度：

2.

等腰三角形的一个外角是140°，此等腰三角形的三个内角的度数分别是( )

A	50°，50°，80°或30°，30°，120°
B	40°，70°，70°或40°，40°，100°
C	50°，50°，80°或60°，60°，60°
D	40°，70°，70°或50°，50°，80°

正确答案：Qg==

PGRpdj7lvZPmmK/pobbop5LnmoTlpJbop5Lml7bvvIzpobbop5LluqbmlbAxODDCsC0xNDDCsD00MMKw77yM5bqV6KeSNzDCsDwvZGl2PjxkaXY+5b2T5piv5bqV6KeS55qE5aSW6KeS5pe277yM5bqV6KeS5bqm5pWwMTgwwrAtMTQwwrA9NDDCsO+8jOmhtuinkuW6puaVsDEwMMKwPC9kaXY+

3/5单选题

难度：

3.

等腰三角形一腰上的高等于腰的一半，那么这个等腰三角形各内角的度数为( )

A	130°，25°，25°或30°，75°，75°
B	150°，15°，15°或30°，75°，75°
C	150°，15°，15°或40°，70°，70°
D	80°，50°，50°或90°，45°，45°

正确答案：Qg==

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

4/5单选题

难度：

4.已知一个等腰三角形的两个内角的比值是2：5，则这个等腰三角形的顶角的度数是（　　）

A	30°
B	75°
C	30°或75°
D	30°或100°

正确答案：RA==

PGRpdj7ikaDorr7pobbop5LnmoTluqbmlbDmmK8yeMKw77yM5YiZ5pyJ77yaMngrNXgrNXg9MTgw77yM6Kej5b6X77yaeD0xNe+8jOaJgOS7pemhtuinkuW6puaVsOaYr++8mjJ4PTMw77ybPC9kaXY+PGRpdj7ikaHorr7pobbop5LnmoTluqbmlbDmmK81eMKw77yM5YiZ5pyJ77yaNXgrMngrMng9MTgw77yM6Kej5b6X77yaeD0yMO+8jOWImeacie+8mumhtuinkuW6puaVsOaYr++8mjV4PTEwMDwvZGl2Pg==

5/5单选题

难度：

5.

已知等腰三角形一边上的高线等于某边的一半，则该等腰三角形的顶角的度数为( )度.

A	20或50或150或160
B	30或100或120或150
C	30或90或120或150
D	40或90或110或150

正确答案：Qw==

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