论文部分内容阅读
例1如图1,已知五角星形的顶点分别为A、B、C、D、E,请你求出∠A+∠B+∠C +∠D+∠E的度数.
Example 1 As shown in Figure 1, known vertices pentagonal star were A, B, C, D, E, you find the ∠ A + ∠ B + ∠ C + ∠ D + ∠ E degree.