6 1 polygons 6 2 properties of parallelograms
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6.1 Polygons 6.2 Properties of Parallelograms PowerPoint PPT Presentation


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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 Polygons 6.2 Properties of Parallelograms

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6 1 polygons 6 2 properties of parallelograms

6.1 Polygons6.2 Properties of Parallelograms

Essential Question: How would you describe a polygon?


Polygons

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.


Polygons are named by the number of sides they have

Polygons are named by the number of sides they have:


Describing polygons

Describing Polygons

  • Convex

  • Concave; (Hint: side is caved in)


6 1 polygons 6 2 properties of parallelograms

  • Equilateral

  • Equiangular

  • Regular – all angles and sides are the same.

*do #1-13 from overhead


6 1 polygons 6 2 properties of parallelograms

  • Diagonal – segment that joins two vertices.


Interior angles of a quadrilateral

Interior Angles of a Quadrilateral

  • Angles of a quadrilateral add up to 360°.

*problems 14-16 from overhead


Assignment

Assignment

  • P.325 #4-20, 24-26, 37-39, 41-45


6 2 parallelograms

6.2 Parallelograms

  • Parallelogram- quadrilateral with both pairs of opposite sides parallel


4 properties of parallelograms

4 Properties of Parallelograms

  • If a quadrilateral is a parallelogram, then its opposite sides are congruent.


6 1 polygons 6 2 properties of parallelograms

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


6 1 polygons 6 2 properties of parallelograms

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


6 1 polygons 6 2 properties of parallelograms

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


Examples using properties of parallelograms

Examples: Using Properties of Parallelograms:


Assignment1

Assignment

  • Complete #1-21 from overhead

  • P. 333 #2-37 depending on time


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