4 Written questions
4 Multiple choice questions
- A quadrilateral with four congruent sides and four right angles.
- a) Propose a new conditional by negating the original conclusion. b) Show the absurdity of the new conditional.
- ...then the parallelogram is a rhombus.
- A quadrilateral with two pairs of parallel, congruent sides.
3 True/False questions
indirect proof → A proof by contradiction. A proof in which the statement you want to prove is assumed to be false.
If one angle of a parallelogram measures 90 degrees... → ...then the parallelogram is a rectangle.
If one pair of sides of a quadrilateral are both parallel and congruent... → ...then the parallelogram is a rhombus.