Circle

Using circumference to find a circle's area. Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

An intro to circles, radii, diameters, and chords

Using circumference to find a circle's area

As you'll see, there are 360 degrees in every circle

How to find the area of any slice of a circle

Some lines cross circles twice, others touch them only once

Calculate the radius of any inscribed circle

An angle whose vertex is the center of a circle and whose sides pass through a pair of points on the circle.

This lesson will look at examples to explain geometric concepts.