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数学
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已知,如图,在△ABC中AB=AC,以AB为直径的圆交BC于点D,交AC于点E,
求证:
BD
=
DE
.
人气:416 ℃ 时间:2019-08-21 02:26:46
解答
证明:连接AD.
∵AB是直径
∴∠ADB=90°
∴AD⊥BC
∴∠BAD=∠CAD
∴
BD
=
DE
.
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