Use the slider to rotate pentagon ABCDE about the center of rotation, R. The angle through which the pentagon is rotated is ZCRC', represented by the variable a, where 0° < a < 360°. At what values of adoes pentagon A'B'C'D' E' coincide with pentagon ABCDE? Enter the values in the table. For each value of a that you enter, enter the vertex that coincides with vertex C".​