Download 1-2-quadrilaterals-parallelograms-notes

GSE Geometry Support
Unit 1 – Transformations
1.3 – Notes
Name: __________________________________________ Date: _____________________________
Quadrilaterals – Parallelograms
UNIT QUESTION: What are the properties and characteristics of polygons?
Today’s Question: What four things do we know about all parallelograms?
A parallelogram is a quadrilateral with both pairs of opposite sides parallel.
If a quadrilateral is a parallelogram,
then its opposite sides are congruent.
If a quadrilateral is a parallelogram,
then its opposite angles are congruent.
If a quadrilateral is a parallelogram,
then its consecutive angles are supplementary.
If a quadrilateral is a parallelogram,
then its diagonals bisect each other.
If a quadrilateral is a parallelogram,
then its opposite sides are parallel.
Practice:
K
1.
15
23
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K
3.
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L
M
M
L
105°
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105°
K
2.
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4.
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32
L
M