Post on 06-Jan-2018
transcript
7.4 Special ParallelogramsRectangles, Rhombi and Squares
Warm-upPlace the words Parallelograms, Rectangles, Rhombi and Squares in the Venn Diagram.
• https://www.youtube.com/watch?v=lW3I7yz5nVo
Parallelogram Family Tree
Definitions• Rectangle – An equiangular parallelogram.• Rhombus – An equilateral parallelogram.• Square – A regular parallelogram
Let’s Investigate The Diagonals of Special Parallelograms
Parallelogram Diagonals ConjecturesParallelogram: 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.
3) Diagonals are perpendicular.4) Diagonals are congruent.
Using diagonals to prove a quadrilateral is a special parallelogram
Always, Sometimes or Never
Guided Practice1)
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3)
Exit Ticket• Place the words Parallelograms, Rectangles,
Rhombi and Squares in the Venn Diagram.