1. DRILL What is the slope of the y-axis?
What is the slope of the x-axis?
What do you know about the x and y axis in reference to each other? (Justify)
A classmate claims that having no slope and having a slope of 0 are the same. Is your classmate right? Explain.

2. 6.2 Quadrilaterals

5. Special Quadrilaterals
Parallelogram: Quadrilateral where opposite sides are parallel and congruent.
Rhombus: Parallelogram with four congruent sides.
Square: Parallelogram with four congruent sides and four right angles.

6. Special Quadrilaterals
Kite: Quadrilateral with two pairs of adjacent sides congruent but no opposite sides congruent.
Trapezoid: is a quadrilateral with exactly one pair of parallel sides.
Isosceles Trapezoid: is a trapezoid whose non-parallel sides are congruent.

7. Intro: Properties of Parallelograms
Property
Parallelogram
Rectangle
Rhombus
Square
Trapezoid
Kite
Opposite sides are parallel
Opposite sides are congruent
Opposite angles are congruent
Diagonals are congruent
Diagonals are perpendicular
Diagonals bisect each other
All angles are right angles.
All sides are congruent.

8. ABCD is a parallelogram
Find AD
Find angle B

9. Example

10. Examples

11. Examples

12. Example Proof

13. Proof Solution

14. Classwork Pages 93 – 94 #’s 1 – 4, 6 – 8(true/false) #’s 14, 16, 26
Extra Credit # 27 (Show all work)

15. Homework
Worksheet # 2.4