试说明角A+角B=角C+角D+角E+角F
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试说明角A+角B=角C+角D+角E+角F
![](http://img.wesiedu.com/upload/f/a9/fa9cc2339727e88ee171a9b074952e38.jpg)
![](http://img.wesiedu.com/upload/f/a9/fa9cc2339727e88ee171a9b074952e38.jpg)
![试说明角A+角B=角C+角D+角E+角F](/uploads/image/z/7426217-65-7.jpg?t=%E8%AF%95%E8%AF%B4%E6%98%8E%E8%A7%92A%EF%BC%8B%E8%A7%92B%EF%BC%9D%E8%A7%92C%EF%BC%8B%E8%A7%92D%EF%BC%8B%E8%A7%92E%EF%BC%8B%E8%A7%92F)
连结CD, 有
A + B = 180 - AMB = 180 - CMD = MCD + MDC = (MCN + NCD) + (MDN + NDC) = (NCD + NDC) + (MCN + MDN) = (180 - CND) + (MCN + MDN) = (180 - ENF) + (MCN + MDN) = (E + F) + (C + D)
A + B = 180 - AMB = 180 - CMD = MCD + MDC = (MCN + NCD) + (MDN + NDC) = (NCD + NDC) + (MCN + MDN) = (180 - CND) + (MCN + MDN) = (180 - ENF) + (MCN + MDN) = (E + F) + (C + D)
试说明角A+角B=角C+角D+角E+角F
角a+b+c+d+e+f
试说明角A+角B=角C+角D+角E+角F
试说明角A+ B +C +D +E+ F=360
角B等于角C,A E//B C,试说明A E平分角C A D
求角A.B.C.D.E.F.之和
角a+角b+角c+角d+角e+角e+角f
求角a+b+c+d+e
如图所示,六边形abcdef中,角a等于角d,角b等于角e,角c等于角f,试说明af和cd平行.
如图,已知D、E、F和A、B、C分别在两条直线上,BD平行于CE,角C=角D,试说明角A=角F
如图,已知D.E.F和A.B.C.分别在两条直线上,BD平行CE,角C等于角D.试说明角A等于角F
如图,点A,B,D,E,在同一条直线上,AD=EB,BC//DF,角C=角F,试说明:AC=EF