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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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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

  • Diagonal: Segment that connects nonconsecutive vertices.


Practice


Classification of Polygons by their number of sides

Triangle

Octagon

Quadrilateral

nonagon

Pentagon

decagon

Hexagon

dodecagon

heptagon

N-gon


Practice


Warm-up

  • Name the following polygons


Quadrilateral Interior Angles Theorem

  • The sum of the measures of the four angles of a quadrilateral equals 360˚

    • Ex:

      ____ + ____ + ____ + ____ = 360


Practice


Reflectional Symmetry

  • When a figures reflected image across a line coincides with the preimage

U LOVE GEOMETRY!


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


Practice


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


Example


Practice


Practice


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