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Warm-up

Warm-up. Grab your clicker for todays warm-up. Geometry: Chapter 6. 6.1: Polygons. All polygons: What is special about them?. Polygon: A plane figure that is formed by 3 or mores segments. Sides: Segments Vertex: Where sides meet

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Warm-up

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Presentation Transcript

  1. Warm-up • Grab your clicker for todays warm-up

  2. Geometry: Chapter 6 6.1: Polygons

  3. All polygons: What is special about them?

  4. Polygon: A plane figure that is formed by 3 or mores segments. • Sides: Segments • Vertex: Where sides meet • Diagonal: Segment that connects nonconsecutive vertices.

  5. Practice

  6. Classification of Polygons by their number of sides Triangle Octagon Quadrilateral nonagon Pentagon decagon Hexagon dodecagon heptagon N-gon

  7. Practice

  8. Warm-up • Name the following polygons

  9. Quadrilateral Interior Angles Theorem • The sum of the measures of the four angles of a quadrilateral equals 360˚ • Ex: ____ + ____ + ____ + ____ = 360

  10. Practice

  11. Reflectional Symmetry • When a figures reflected image across a line coincides with the preimage U LOVE GEOMETRY!

  12. Line of symmetry: a line that a figure has if it can be mapped onto itself by a reflection

  13. Practice

  14. Rotational symmetry if the figure has at least one rotation image, not counting 0° or 360°, that coincide with the original figure. Describing Rotational Symmetry: State the number of positions the figure coincides with itself, including original position

  15. Example

  16. Practice

  17. Practice

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