BD平分角ABC BE分角ABE:角EBC=2:5,角EBC=27°,求角ABC的度数

问题描述:

BD平分角ABC BE分角ABE:角EBC=2:5,角EBC=27°,求角ABC的度数

BE分∠ABE:∠EBC=2:5
∠EBC=27°
∠ABE=27°*2/5=10.8°
∠ABC=∠EBC+∠ABE=27°+10.8°=37.8°