请用这些数学词语写一个故事

有一个五边形,它的边长相等,每个内角都相等.那么猜一猜它的外角是多少呢?
There is a pentagram,its side length equal,each interior Angle are equal.So guess its exterior Angle?
故事：
一次数学课上,老师剪了一个五边形.老师说：“同学们,这个五边形的各边是相等的,而且每个角都相等,你们猜一猜,它的外角是多少呢.”
同学们议论纷纷.
其实,任何一个多边形的外角都是360°
Story:
A math class,the teacher cut a pentagon.The teacher said:"the classmates,the pentagonal each side is the same,but each Angle are equal,you guess,how much is it quoin."
The classmates comment in succession.
In fact,any a polygonal external Angle is 360 °
以上是英汉对译