1. 7.4 Special Parallelograms
Rectangles, Rhombi and Squares

3. Warm-up
Place the words Parallelograms, Rectangles, Rhombi and Squares in the Venn Diagram.

5. Parallelogram Family Tree

6. Definitions Rectangle – An equiangular parallelogram.
Rhombus – An equilateral parallelogram.
Square – A regular parallelogram

7. Let’s Investigate The Diagonals of Special Parallelograms

8. Parallelogram Diagonals Conjectures
Parallelogram: 1) Diagonals bisect each other.
Rectangle: 1) Diagonals bisect each other.
2) Diagonals are congruent.
Rhombus: 1) Diagonals bisect each other.
2) Diagonals bisect the angles of the rhombus.
3) Diagonals are perpendicular.
Square: 1) Diagonals bisect each other.
2) Diagonals bisect the angles of the square.
4) Diagonals are congruent.

9. Using diagonals to prove a quadrilateral is a special parallelogram

10. Always, Sometimes or Never

11. Guided Practice
1) 2) 3)

13. Exit Ticket
Place the words Parallelograms, Rectangles, Rhombi and Squares in the Venn Diagram.