8.3: Polygons

1) Lesson Objectives:

You should be able to

• distinguish what are polygons

• find the sum of interior angles of any n-sided polygons

• find the sum of exterior angles of any n-sided polygons

• find the each interior angle of a regular n-sided polygons

• find the each exterior angle of a regular n-sided polygons

Terminologies

• regular polygons

• interior angles

• exterior angles

A: What are polygons?

B: Regular polygons

C: Sum of interior angles of polygon

D: Sum of exterior angles of polygon

E: Line of symmetry

F: Rotational symmetry

NOTE:

Order of rotation: Refers to the number of times a figure rotates and fit onto the original shape. All figures will have at least One order of rotational symmetry as it goes 360 deg.