M4G1 Students will define and identify the characteristics of geometric figures through examination and construction.M4G2 Students will understand fundamental solid figures.

Opening

The word polygon means “many angles”

A two dimensional object A closed figure

Made up of three or more straight line segments

There are exactly two sides that meet at a vertex

The sides do not cross each other

Side: One of the line segments that make up a polygon.

Vertex: point where two sides meet.

Regular Polygon: all sides have equal length and all the angles have equal measure.

Triangle: a three sided polygon

Quadrilateral: a four sided polygon. A quadrilateral that is a regular polygon is called a square.

Pentagon: a five sided polygon

Hexagon: a six sided polygon

A heptagon has seven sides.

Octagon: an eight sided polygon

Decagon: a ten sided polygon

Triangle eight sides

Heptagon three sides

Octagon seven sides

Work Session

Pentagon four sides

Hexagon five sides

Square six sides

Regular or Irregular1.

2.

3.

Practice on Your Own!

Closing:How many sides does each polygon have? ______________

Do all polygons look the same? _____________

Can I know the name of a shape just by looking at it? ______________________