Awidow peak is a trait controlled by many genes true or false

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

Can someone me out here and the tell me the greatest common factor

Hi, can anyone show me how to do this problem? 100 points for this. in advance