如圖，AB∥CD，∠BED=110°，BF平分∠ABE，DF平分∠CDE，則∠BFD=（ ） A.110° B.115° C.125° D.130°
如圖，AB∥CD，∠BED=110°，BF平分∠ABE，DF平分∠CDE，則∠BFD=（ ?。?br/> 
A. 110°
B. 115°
C. 125°
D. 130°
A. 110°B. 115°
C. 125°
D. 130°
數(shù)學(xué)人氣：222 ℃時(shí)間：2020-02-26 23:44:24
優(yōu)質(zhì)解答
過點(diǎn)E作EM∥AB，過點(diǎn)F作FN∥AB，∵AB∥CD，∴EM∥AB∥CD∥FN，∴∠ABE+∠BEM=180°，∠CDE+∠DEM=180°，∴∠ABE+∠BED+∠CDE=360°，∵∠BED=110°，∴∠ABE+∠CDE=250°，∵BF平分∠ABE，DF平分∠CDE，∴∠ABF=12...
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