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# Warm-up - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' Warm-up' - eunice

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Presentation Transcript

• Grab your clicker for todays warm-up

### Geometry: Chapter 6

6.1: Polygons

• Polygon: A plane figure that

is formed by 3 or mores

segments.

• Sides: Segments

• Vertex: Where sides meet

• Diagonal: Segment that connects nonconsecutive vertices.

Triangle

Octagon

nonagon

Pentagon

decagon

Hexagon

dodecagon

heptagon

N-gon

• Name the following polygons

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

• Ex:

____ + ____ + ____ + ____ = 360

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

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