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Verifying Properties of Geometric Figures The Process of Verifying is similar to an essay. The solution is a formal proof. Examples: 1. A quadrilateral has vertices A(0,0), B(2,3) C(7,3) and D(5,0), verify that it is a parallelogram. Solution: Compare mAB & mCD and mBC & mAD 2. Given the points X(3,3) , Y(-1,4) and Z(1,-5) , verify that XYZ is a right triangle. 3. DEF has vertices D(5,2) , E(0,3) and F(4,-3). Verify that DEF is an isosceles right triangle. Follow Up: Page 89 #3,5,6,7,8,9,17