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6.1 Polygons 6.2 Properties of Parallelograms. Essential Question: How would you describe a polygon?. Polygons. Plane figure formed by three or more sides. Each endpoint of a side is a vertex . To name a polygon, list its vertices in order.
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6.1 Polygons6.2 Properties of Parallelograms Essential Question: How would you describe a polygon?
Polygons • Plane figure formed by three or more sides. • Each endpoint of a side is a vertex. • To name a polygon, list its vertices in order.
Describing Polygons • Convex • Concave; (Hint: side is caved in)
Equilateral • Equiangular • Regular – all angles and sides are the same. *do #1-13 from overhead
Interior Angles of a Quadrilateral • Angles of a quadrilateral add up to 360°. *problems 14-16 from overhead
Assignment • P.325 #4-20, 24-26, 37-39, 41-45
6.2 Parallelograms • Parallelogram- quadrilateral with both pairs of opposite sides parallel
4 Properties of Parallelograms • 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.
Assignment • Complete #1-21 from overhead • P. 333 #2-37 depending on time