Polygons

By Zania Catano

Polygons

​Polygons

• The word polygon means “many angles.” ​Poly = many; gon = angle

• ​They are 2-dimensional shapes.

• ​The sides are straight lines.

• ​Non of the line segments can cross one another

• ​The shape is “closed,” that is, all the lines are connected

Multiple Choice

What is a polygon?

• A closed figure made up of straight lines segments

• A closed figure made up of curved edges

• An open figure made up of straight line segments

• A closed figure made up of crossed line segments.

Not a polygon

• Not a closed shape.

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• ​Not straight line segments.

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• ​Sides that intersect

Multiple Choice

Which one is NOT a polygon?

Multiple Choice

Which one is a polygon?

Multiple Choice

Which one is a polygon?

​Some text here about the topic of discussion.

• Regular: all the angles are equal and all the sides are equal.

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Multiple Choice

A polygon is...

• A shape that has curved edges

• A shape with at least 5 sides

• A shape with straight sides that meet at angles

• A shape that has 4 sides or more

Multiple Choice

True or false:

A circle is a polygon.

• True

• False

Multiple Choice

A polygon is regular if:

• Only all angles are equal.

• All angles are equal and all sides are equal

• Only all sides are equal

• All sides have different measurements

Polygons are named according to the number of sides and angles they have.

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For example: a triangle has three sides, a pentagon has five sides, a dodecagon has twelve sides.

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Whatever their shape, all polygons are made up of the same parts:

sides, vertices (connecting points), and angles (inside and outside the shape).

Multiple Choice

What is a vertex?

• The point where two waves meet

• The point where two sides meet

Multiple Choice

Name this polygon

• Hexagon

• triangle

• Pentagon

• Octagon

Multiple Choice

How many sides are on a quadrilateral polygon?

• 4

• 5

• 6

• 8

Multiple Choice

Name this polygon

• heptagon

• Pentagon

• hexagon

• quadrilateral

Multiple Choice

Name this polygon

• Pentagon

• hexagon

• heptagon

• octagon