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Geometry
January 30, 2017
6.2/3 Parallelograms
DO NOW
1.
Solve for x: 6x + 5x – 2 = 20
2.
Solve for x: 4(x – 2) = 16
3.
What is the sum of the interior angles of a hexagon? (Hint:
𝑛 − 2 ⋅ 180°)
4.
What is the measure of each interior angle of a regular
octagon?
Announcement
QUIZ WEDNESDAY
On 6.1, 6.2, 6.3
Today’s Objectives
1. Understand and apply basic properties of
parallelograms
Review: Parallelogram
Definition: A quadrilateral with two pairs of
parallel sides.
Review: 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.
Review: 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
Practice
Practice
Practice
Practice
Practice
Practice
Practice
Practice
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