Geometry and Polygons

​Introduction to Polygons

​Geometry 1-4 Part 1

by Dianne Saevig

​What's a polygon?

​​A polygon is a closed shape, that doesn't cross itself, that is made of straight sides connected end-to-end.

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​Put the purple text in your notes.

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Multiple Choice

Polygon?

• Yes

• No

Multiple Choice

Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

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Polygon?

• Yes

• No

​Convex & Concave

​A polygon is convex when no line that contains a side of the polygon contains a point in the interior of the polygon.

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***Text in purple needs to be in your notes. The picture could be helpful.

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

Multiple Choice

Identify the shape as convex polygon, concave polygon or no polygon.

• convex polygon

• concave polygon

• not a polygon

​Classifying Polygons by the Number of Sides

​3 sides --> triangle

​4 sides --> quadrilateral

​5 sides --> pentagon

​6 sides --> hexagon

​8 sides --> octagon

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​Purple text goes into notes.

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Octagon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexagon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon

Multiple Choice

What type of polygon is this?

• Triangle

• Quadrilateral

• Hexgon

• Pentagon