'Quadrilateral xyzw' presentation slideshows

11.2 Areas of Triangles, Trapezoids, and Rhombi

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Examine trapezoid TRAP . Explain why you can assign the same y -coordinate to points R and A .

In a trapezoid, only one pair of sides is parallel. In TRAP , TP || RA . Because TP lies on the horizontal x -axis, RA also must be horizontal. . Proofs Using Coordinate Geometry. LESSON 6-7. Additional Examples.

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