1. Warm up 1) Draw all lines of symmetry
2) Draw a figure with 6-fold rotational symmetry using  A B D C
3) Name 4 congruent isosceles triangles

2. Sect. 3-2 Quadrilaterals

3. Quadrilaterals Def: Any four sided polygon is a quadrilateral
3.2 Properties of Quadrilaterals
Quadrilaterals
Def: Any four sided polygon is a quadrilateral

4. Types of Quadrilaterals
3.2 Properties of Quadrilaterals
Types of Quadrilaterals
Trapezoid is a quadrilateral with one and only one pair of parallel sides

5. Types of quadrilaterals
Parallelogram is a quadrilateral with two pairs of parallel sides
Rhombus is a parallelogram with four congruent sides

6. Types of quadrilaterals
Rectangle is a parallelogram with four right angles
Square is a parallelogram with four congruent sides and four right angles

7. 3.2 Properties of Quadrilaterals
Classify 1) 2)

8. 3.2 Properties of Quadrilaterals
Def: consecutive angles of a polygon are angles that have a side in common B A C

9. Properties of Parallelograms
3.2 Properties of Quadrilaterals
Properties of Parallelograms
opposite sides are ______________
opposite angles are___________
the diagonals ____________ each other
consecutive angles are ________________.

10. Properties Rhombus: the diagonals are ____________
3.2 Properties of Quadrilaterals
Properties
Rhombus:
the diagonals are ____________

11. Properties Rectangle: the diagonals are ____________
3.2 Properties of Quadrilaterals
Properties
Rectangle:
the diagonals are ____________

12. Properties Square: the diagonals are _______________________
3.2 Properties of Quadrilaterals
Properties
Square:
the diagonals are _______________________

13. 3) Rhombus ABCD AB = 6, AC = 8, andE D C
Find:
Find:

14. Key Skills given: MA = 16 RA = 9 find GR = GM= G R M A
3.2 Properties of Quadrilaterals
Key Skills
given:
MA = 16
RA = 9
find
GR =
GM= G R M A

15. Key Skills 5) Make a conjecture about the properties of
3.2 Properties of Quadrilaterals
Key Skills
5) Make a conjecture about the properties of
parallelograms.

16. Assignment
Page 151 # 5-33 all
Quiz next time on 3-1 and 3-2