1.一组对边平行且一组对角相等例1如图1所示,CD∥AF,∠D=∠A,AB⊥BC,∠C=124°,∠E=80°,求∠AFE的度数.分析由于六边形的内角中有三个角的度数未知,故直接通过内角和难以求出(∠AFE的度数.根据题意,已知一组边平行即CD∥AF),且有对角相等(即∠A= 1. A set of parallel to the edge and a set of diagonal equal Example 1 As shown in Figure 1, CD∥AF, ∠D = ∠A, AB⊥BC, ∠C = 124 °, ∠E = 80 °, find ∠AFE The degree of the hexagon.According to the hexagonal angle of the three corners of the angle is unknown, it is difficult to obtain directly through the internal angle (∠AFE degrees according to the title, known to a group of parallel edge that is CD∥AF), and there Diagonal equal (ie ∠A =