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Geometry
January 23, 2017
6.2/3 Parallelograms
DO NOW
Solve for x:
1. 3x + 2 = 17
2. 3(x – 4) = 15
3. 6 – (3x + 4) = x
4. 2x + 4 = 10
Today’s Objectives
1. Understand and apply basic properties of
parallelograms
Practice
Parallelogram
Definition: A quadrilateral with two pairs of
parallel sides.
Properties of parallelograms
1. Both pairs of opposite sides are congruent.
2. Both pairs of opposite angles are congruent.
3. Consecutive pairs of angles are
supplementary.
4. The diagonals bisect each other.
A quadrilateral is a parallelogram if…
1. Both pairs of opposite sides are congruent.
2. Both pairs of opposite angles are congruent.
3. Consecutive pairs of angles are
supplementary.
4. The diagonals bisect each other.
5. One pair of sides is parallel and congruent.
Practice
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