Bell Ringer: What do you know about quadrilaterals and parallelograms?

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Presentation transcript:

Bell Ringer: What do you know about quadrilaterals and parallelograms?

9.1 & 9.2 Properties of Parallelograms Essential Question: What can you conclude about the sides, angles, and diagonals of a parallelogram?

Quadrilateral- a polygon with four sides Parallelogram- a quadrilateral; opposite sides are parallel; opposite sides are congruent; opposite angles are congruent; consecutive angles are supplementary; diagonals bisect each other

ABCD is a parallelogram. Find each measure. 1. AD 2. m<B

PQRS is a parallelogram. Find each measure. 2. PR

Show that each quadrilateral is a parallelogram for the given values of the variables. 1. x=7 2. y=4

1. z=11 2. w=4.5

1. a=2.4 2. b=9

1. x=6 2. y=3.5

Tear out pages 421-422 427-429 6-13; 17-21 441-442 5-12

p. 427 6. 44 7. 80 8. 121 9. 23 10. 17.5 11. 18 12. 70 13. 110 17. Sometimes 18. Always 19. Always 20. Never 21. Never p. 441 5. Show work 6. Show work 7. No 8. Yes 9. Yes 10. No 11. Yes 12. No