249Chapter 861.ABis a side. Find the slope of AB.myx22yx1152((25))7362.BDis a diagonal. Find the slope of BD.myx22yx1119(52)1463.CDis a side. Find the slope of CD.myx22yx1191(22)73Tests for ParallelogramsPage 417Geometry Activity: Testing for aParallelogram1.They appear to be parallel.2.The quadrilaterals formed are parallelograms.3.The measures of pairs of opposite sides are equal.4.Opposite angles are congruent, and consecutiveangles are supplementary.5.Opposite sides are parallel and congruent,opposite angles are congruent, or consecutiveangles are supplementary.Pages 420–421Check for Understanding1.Both pairs of opposite sides are congruent; bothpairs of opposite angles are congruent; diagonalsbisect each other; one pair of opposite sides isparallel and congruent.2.Sample answer:3.Shaniqua; Carter’s description could result in ashape that is not a parallelogram.
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