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

Not a polygon

• Not a closed shape.

​

• ​Not straight line segments.

​

• ​Sides that intersect

​Some text here about the topic of discussion.

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

​

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

​

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

​

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 polygon?

• A closed figure made up of straight line segments

• An open figure made up of straight line segments

• A closed figure made up of curved edges

• An closed figure made up of crossed line segments

Multiple Choice

How many sides does a Pentagon have?

• 4

• 3

• 5

• 9

Multiple Choice

Which of these figures are considered polygons?

• a, b, c, d

• b, d, e, f

• a, b, c

• a, e, f

Multiple Choice

 What is the name of this polygon?

• a pentagon

• a quadrilateral

• an octagon

• a triangle

Multiple Choice

Polygon or non-polygon?

• Polygon

• Non-Polygon

Multiple Choice

Polygon or Non-Polygon?

• Polygon

• Non-Polygon

Multiple Choice

How many vertices does this shape have?

• 5

• 9

• 8

Multiple Choice

I am a polygon.  I have more than one more vertex than a square has.  What am I?

• triange

• rectangle

• pentagon

• octagon

Multiple Choice

What is a vertex?

• The point where two waves meet

• The point where two lines meet

• The point where two sides meet

• The point where two segments meet

Multiple Choice

A polygon has to have

• at least two sides

• at least three sides

• four or more sides

• no sides

Multiple Choice

Which of these is a polygon?

• cube

• quadrilateral

• angle

• circle

Multiple Choice

Which one is NOT a polygon?

Multiple Choice

Which one is a polygon?

Multiple Choice

Which one is a polygon?

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

Multiple Choice

How many sides are on a quadrilateral polygon?

• 4

• 5

• 6

• 8

Multiple Choice

Polygon or Non-Polygon?

• Polygon

• Non-Polygon

Multiple Choice

Polygon or Non-Polygon?

• Polygon

• Non-Polygon

Multiple Choice

Regular or irregular polygon?

• Regular Polygon

• Irregular Polygon

Multiple Choice

Regular or irregular polygon?

• Regular Polygon

• Irregular Polygon

Multiple Choice

Regular or Irregular Polygon?

• Regular Polygon

• Irregular Polygon