1. Geometry 8.3 Tests for Parallelograms

2. Is it a Parallelogram? Now they will give you a shape and you will have to tell us if it is a parallelogram or not. If it is you will have to tell why - that means giving a theoremto justify your answer

3. Before anything else The shape has to have four sides and four angles.

4. Theorem 8-7 If both pairs of opposite sides are the same, then you can say it is a parallelogram

6. Theorem 8-8 If one pair of opposite sides is the same and parallel, then you can say it is a parallelogram.

8. Theorem 8-9 If the diagonals bisect each other then it is a parallelogram.

10. Time to play IS IT A PARALLELOGRAM?

11. 110 70

12. IS IT A PARALLELOGRAM? Yes - by the definition of a parallelogram

13. 8.3 3-16