1. Geometry SECTION 6: QUADRILATERALS

2. Properties of Parallelograms

6. Is it a parallelogram?

10. Summary: Ways to Prove it’s a Parallelogram  Show both pairs of opposite sides are parallel  Show both pairs of opposite sides are congruent  Show both pairs of opposite angles are congruent  Show one pair of opposite sides are congruent and parallel  Show the diagonals bisect each other

11. Properties of Rhombuses, Rectangles, and Squares

14. What does that mean???  All squares are both rhombuses (rhombi??) and rectangles.  Some rhombuses are squares and inherently then also rectangles.  Some rectangles are squares and inherently then also rhombuses.

15. Parallelograms and Rhombuses, Rectangles, & Squares

18. Trapezoids  A trapezoid is a quadrilateral with exactly one pair of parallel sides. The parallel sides are the bases.  A trapezoid has two pairs of base angles. For example, in trapezoid ABCD, <A and <B are one pair of base angles, and <C and <D are the second pair. The non parallel sides are the legs of the trapezoid.

19. Trapezoids

22. Midsegment Theorem for Trapezoids

23. KITES  A Kite is a quadrilateral that has two pairs of consecutive congruent sides, but opposite sides are not congruent.

24. Kites

26. Identifying Special Quadrilaterals Quadrilaterals Parallelograms Trapezoid Kite Rectangle Rhombus Isosceles Trapezoid Square