In Exercises 27 to 30 use the definition of a parallelogram to complete each proof 27 Given Prove R V 1 RS VT 2 3 4 RS VT RV 1 VT and ST VT RSTV is a parallelogram Statements S PROOF Reasons 1 2 Given 3 If two lines are to the same line they are to each other 4 If both pairs of opposite sides of a quadrilateral are II the quadrilateral is a