Warm-Up
Exercises
Bell Work
What are the six characteristics of parallelograms
that we discussed yesterday? List as many as you
can first without looking at your notes.
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Warm-Up
Exercises
Notes
Ways to Prove a Quadrilateral is a Parallelogram
#1 Show both pairs of opposite
sides are parallel.
Warm-Up
Exercises
Notes
Ways to Prove a Quadrilateral is a Parallelogram
#2 Show both pairs of opposite
sides are ___________.
Warm-Up
Exercises
Notes
Ways to Prove a Quadrilateral is a Parallelogram
#3 Show both pairs of opposite
_________ are congruent.
Warm-Up
Exercises
Notes
Ways to Prove a Quadrilateral is a Parallelogram
#4 Show one pair of opposite
sides are congruent and parallel.
Warm-Up
Exercises
Notes
Ways to Prove a Quadrilateral is a Parallelogram
#5 Show the diagonals bisect
each other.
Warm-Up
Exercises
GUIDED
PRACTICE
1. In quadrilateral WXYZ, m W = 42°, m X =138°,
m Y = 42°. Find m Z. Is WXYZ a parallelogram?
Explain your reasoning.
Warm-Up2Exercises
EXAMPLE
The doorway shown is part of a
building in England. Over time,
the building has leaned sideways.
Explain how you know that
SV = TU.
Warm-Up
Exercises
GUIDED
PRACTICE
5. For what value of x is
quadrilateral MNPQ a
parallelogram?
Explain your reasoning.
Warm-Up4Exercises
EXAMPLE
Show that quadrilateral ABCD
is a parallelogram.
Warm-Up
Exercises
Daily
Homework
Quick
CheckQuiz
Tell how you know that the quadrilateral is a
parallelogram
1.
Warm-Up
Exercises
Daily
Homework
Quick
CheckQuiz
Tell how you know that the quadrilateral is a
parallelogram
2.
Warm-Up
Exercises
Daily
Homework
Quick
CheckQuiz
3.
For what value of x is the quadrilateral a
parallelogram.
Warm-Up
Exercises
Daily
Homework
Quick
CheckQuiz
4.
In a coordinate plane, draw the quadrilateral ABCD
with vertices A(–1, 3), B(7, –1), C(6, –4), and D(–2, 0).
show that ABCD is a parallelogram.
Warm-Up
Exercises
For Tomorrow
Homework
HW: 8.3 (pg. 520-521) #1-3,14-17