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## 6.1 Polygons 6.2 Properties of Parallelograms

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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