CirclesToday you will learn to:

•Compare and contrast the different parts of a circle.•Determine the area and circumference of a circle.

M07.C-G.2.2.1: Find the area and circumference of a circle. Solve problems involving area and circumference

of a circle(s). Formulas will be provided.

Circles

Khan Academy Video

Circles

Khan Academy Video

Circles: Examples

Circles: ExamplesIn the example below, determine the

circumference of the circle when given the diameter.

Determining Diameter or Radius from Circumference

Sometimes you may be asked to determine the diameter or radius of a circle when

given the circumference. Simply use your formula for the circumference of a circle

and work backwards to solve algebraically.

Converting Between Circumference and Area

Using the methods from the previous slide, you can determine the area of a circle from it’s circumference, and vice versa. This will

take multiple steps, so be sure to be organized!