1. find the sum of the measures of exterior angles, one at each vertex, of an octagon.a. 180*b. 360* c. 1080*d. 1440* 2. If the sum of the interior angles of a polygon is 900* ( * = degrees) , then how many sides does the polygon have?a. 6b. 7c. 8d. 910. Based on the information given, can you determine that the quadrilateral must be a parallelogram? Explain. 11. The parallelogram has the angle measures shown. Can you conclude that it is a rhombus, rectangle, or a square? Explain.