<P> Also, side AB is equal in length to side DC, since opposite sides of a parallelogram are equal in length . </P> <P> Therefore, triangles ABE and CDE are congruent (ASA postulate, two corresponding angles and the included side). </P> <Dl> <Dd> A E = C E (\ displaystyle AE = CE) </Dd> <Dd> B E = D E . (\ displaystyle BE = DE .) </Dd> </Dl> <Dd> A E = C E (\ displaystyle AE = CE) </Dd>

Which of the following statements is true a. a trapezoid can have four equal sides