同学们学习了与圆有关的角——圆心角和圆周角.与圆有关的角还有一些,在这里我们共同研究一下.一、角和圆的位置关系请你思考一下角和圆有哪些位置关系?由于角的顶点可能在圆内、圆上和圆外,角的边和圆可能相交或相切(角的边与圆相离时,角与圆无关),故角和圆有以下位置关系. Students learn the circle-related corners - the central angle and the circumferential angle.With the circle-related corner there are some, where we study together. First, the angular and circular position, please think about what angle and circle Position Relationships? Since the vertices of the corners may be inside, inside and outside the circle, the edges and the circles of the corners may intersect or be tangent (the corners are not related to the circles when the sides of the corners are apart from each other), the angles and the circles have the following Positional relationship.