问题:
如图:已知AB ∥CD ∥EF,EH⊥CD于H,则∠BAC+∠ACE+∠CEH等于( )
A.180°
B.270°
C.360°
D.450°
如图:已知AB ∥CD ∥EF,EH⊥CD于H,则∠BAC+∠ACE+∠CEH等于( )
A.180° | B.270° | C.360° | D.450° |
参考答案: