设的三条边分别是a,b,C,且a2+b2=c2。证明:ΔABC是直角三角形。(这是勾股定理的逆命题)

作者: tihaiku 人气: - 评论: 0
问题的三条边分别是a,b,C,且a2+b2=c2。证明:ΔABC是直角三角形。(这是勾股定理的逆命题)
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解析 证明.以n.b长为直角边作Rt△A,B,C.设斜边长为d.则由勾股定理得 全等.故ABC是直角三角形。

相关内容:证明,直角三角形,这是,勾股定理,命题

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