Question

点C,E在在射线AM上,点B,D,F在射线AN上,若AB=BC=CD=DE=EF,且∠A=15°

Answer 1

∠MEF=30 ° 因为AB=BC=CD=DE=EF,根据三角形中等边对等角,可知,∠ACB=15°,∠ABC=150°∠CBD=30° ∠BDC=30° ∠BCD=120° ∠DCE=45° ∠BED=45° ∠CDE=90° ∠EDF=60°∠DFE=60° ∠DEF=60°所以,∠MEF=30°...