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数学
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已知,如图△ABC中,AB=AC,D点在BC上,且BD=AD,DC=AC,
(1)写出图中两个等腰三角形;
(2)求∠B的度数.
人气:344 ℃ 时间:2019-08-16 20:49:05
解答
(1)△ABC,△ACD.△ABD,由 AB=AC,可得△ABC是等腰三角形;由 BD=AD,可得△ABD是等腰三角形;由DC=AC得△ACD是等腰三角形.(2)设∠B=x,∵BD=AD,∴∠DAB=∠B=x,∵AB=AC,∴∠C=∠B=x,∵DC=AC,∴∠CA...
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已知,如图△ABC中,AB=AC,D点在BC上,且BD=AD,DC=AC, (1)写出图中两个等腰三角形; (2)求∠B的度数.
已知,如图△ABC中,AB=AC,D点在BC上,且BD=AD,DC=AC, (1)写出图中两个等腰三角形; (2)求∠B的度数.
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