Parts Of A Circle

The area of a circle is the space contained within its circumference, calculated using the formula A = πr², where r is the radius.

The circumference of a circle is the distance around the circle, calculated using the formula C = 2πr or C = πd, where r is the radius and d is the diameter.

The radius is the distance from the center of the circle to any point on its circumference.

The diameter is the distance across the circle through its center, equal to twice the radius.

A chord is a line segment with both endpoints on the circle.

A diameter is a special type of chord that passes through the center of the circle.

A quarter-circle is one-fourth of a circle, representing a 90-degree arc.

An arc is a part of the circumference of a circle.

The radius is half the length of the diameter.

A = πr², where A is the area and r is the radius.