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