试解

来源: monseigneur 于 2024-02-04 17:28:15 [旧帖] [给我悄悄话] 本文已被阅读：次

Angle C = angle D = angle AMN = angle CMH

so triangle MCH is isosceles. Because BMC=90, triangle MBH is also isosceles.

MH = BC/2=2.

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