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数学
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如图8,五边形abcde的內角都相等,且
人气:265 ℃ 时间:2020-02-05 13:09:07
解答
因为五边形内角相等 所以每个角为108度
所以角1=角2=36度 角3=角4=36度
所以角ADB=角EDC-角EDA-角BDC=108-36-36=36度
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