
Lecture 6.2 - Parallelograms
Presentation
•
Mathematics
•
6th - 12th Grade
•
Easy
Gabe Geering
Used 2+ times
FREE Resource
11 Slides • 30 Questions
1
6.2 - Parallelograms
like when your grandmothers are standing next to each other
2
Parallelogram
→ quadrilateral with both pairs of opposite sides parallel
that's all we know... anything else is a theorem (raise the proof)
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Parallelogram Properties
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Parallelogram Diagonal Properties
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Multiple Choice
Find the measure of the angle indicated in the following parallelogram.
95
90
81
86
6
Multiple Choice
Find the measure of the angle indicated in the following parallelogram.
105
46
112
40
7
Multiple Choice
Find the measure of the angle indicated in the following parallelogram.
97
105
95
45
8
Multiple Choice
Find the measure of the angle indicated in the following parallelogram.
150
108
65
55
9
Multiple Choice
Find the measure of the side indicated in the following parallelogram.
13
17
8
22
10
Multiple Choice
Find the measure of the side indicated in the following parallelogram.
23
8
24
18
11
Multiple Choice
12
Multiple Choice
x = 9, y = 4
x = 6, y = 4
x = 6, y = 2
x = 4, y = 2
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14
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6.3 - Tests for Parallelograms
Oh, it's a parallelogram? You think so? PROVE IT 😈
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Conditions for Parallelograms
Kind of like when we proved lines parallel
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Multiple Choice
Is there enough information to determine that this quadrilateral is a parallelogram?
yes, all opposite sides are congruent
yes, opposite angles are congruent
yes, opposite sides are parallel
yes, consecutive interior angles are supplementary
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Multiple Choice
Both pairs of opposite angles are congruent.
Both pairs of opposite sides are congruent.
Both pairs of diagonals bisect each other.
Both pairs of opposite sides are parallel.
24
Multiple Choice
Is there enough information to determine that this quadrilateral is a parallelogram?
yes, opposite sides are congruent
yes, opposite sides are parallel
no, not all pairs of opposite sides are congruent
no, it is not a quadrilateral
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Multiple Choice
State which method we can use to show that the quadrilateral is a parallelogram.
Both pairs of opposite angles are congruent.
Both pairs of opposite sides are congruent.
The diagonals bisect each other.
Both pairs of opposite sides are parallel.
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Multiple Choice
Polygon ABCD is a Quadrilateral which of the following pieces of information would prove that ABCD is a parallelogram?
DB=AC
DA=BC
DA||BC
DA||BC, DA=BC
27
Multiple Choice
Is the quadrilateral a parallelogram?
Yes; one pair of opposite sides are parallel
Yes; one pair of opposite sides are congruent
Yes; one pair of opposite sides are parallel and congruent
No; only one pair of sides are parallel
No; only one pair of sides are congruent
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Multiple Choice
If you can prove that one pair of opposite sides of a parallelogram are the same length and have the same slope, you can prove that it is a parallelogram.
Always
Sometimes
Never
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Multiple Choice
Which theorem shows that the quadrilateral is a parallelogram?
Parallelogram Diagonals Converse
Parallelogram Opposite Sides Converse
Parallelogram Opposite Angles Converse
Opposite Sides Parallel and Congruent Theorem
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Multiple Choice
Which theorem shows that the quadrilateral is a parallelogram?
Parallelogram Diagonals Converse
Parallelogram Opposite Sides Converse
Parallelogram Opposite Angles Converse
Opposite Sides Parallel and Congruent Theorem
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Multiple Choice
Which theorem shows that the quadrilateral is a parallelogram?
Parallelogram Diagonals Converse
Parallelogram Opposite Sides Converse
Parallelogram Opposite Angles Converse
Opposite Sides Parallel and Congruent Theorem
32
Multiple Choice
Find the values of x and y that make the quadrilateral a parallelogram.
x = 3, y = 2
x = 25, y = 15
x = 15, y = 25
x = 113, y = 67
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Multiple Choice
Find the values of x and y that make the quadrilateral a parallelogram.
x = 4, y = 3
x = 3, y = -2
x = 1, y = 4
x = 3, y = 4
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Multiple Choice
Find the value of x that makes the quadrilateral a parallelogram.
x = -4
x = 1
x = 8
x = 34
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Multiple Choice
Find the value of x that makes the quadrilateral a parallelogram.
x = 26
x = 7
x = 2
x = -2
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Multiple Choice
Given the points for quadrilateral ABCD, determine if it is a paralleogram.
A (-2, -4)
B (2, -7)
C (8, 3)
D (4, 6)
yes
no
not enough information
maybe
38
Multiple Choice
Given the points for quadrilateral ABCD, determine if it is a paralleogram.
A (6, 7)
B (-2, 5)
C (-7, 8)
D (1, 11)
yes
no
not enough information
maybe
39
40
Fill in the Blanks
Type answer...
41
Fill in the Blanks
Type answer...
6.2 - Parallelograms
like when your grandmothers are standing next to each other
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