Question

一个数学题.楼主智商捉急,求大神回复.

Answer 1

∠AHE与∠CHG相等证明：∵AD平分∠BAC∴∠BAD＝∠BAC/2∵BE平分∠ABC∴∠ABE＝∠ABC/2∴∠AHE＝∠BAD+∠ABE＝（∠BAC+∠ABC）/2＝（180-∠ACB）/2＝90-∠ACB/2∵CF平分∠ACB∴∠ACF＝∠ACB/2∵HG⊥AC∴∠CHG+∠ACF＝...