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6.1 Polygons 6.2 Properties of Parallelograms

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 Polygons 6.2 Properties of Parallelograms

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  1. 6.1 Polygons6.2 Properties of Parallelograms Essential Question: How would you describe a polygon?

  2. 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.

  3. Polygons are named by the number of sides they have:

  4. Describing Polygons • Convex • Concave; (Hint: side is caved in)

  5. Equilateral • Equiangular • Regular – all angles and sides are the same. *do #1-13 from overhead

  6. Diagonal – segment that joins two vertices.

  7. Interior Angles of a Quadrilateral • Angles of a quadrilateral add up to 360°. *problems 14-16 from overhead

  8. Assignment • P.325 #4-20, 24-26, 37-39, 41-45

  9. 6.2 Parallelograms • Parallelogram- quadrilateral with both pairs of opposite sides parallel

  10. 4 Properties of Parallelograms • If a quadrilateral is a parallelogram, then its opposite sides are congruent.

  11. If a quadrilateral is a parallelogram, then its opposite angles are congruent.

  12. If a quadrilateral is a parallelogram, then its consecutive angles are supplementary.

  13. If a quadrilateral is a parallelogram, then its diagonals bisect each other.

  14. Examples: Using Properties of Parallelograms:

  15. Assignment • Complete #1-21 from overhead • P. 333 #2-37 depending on time

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