Parts of a Circle Flashcard

Front

Fraction of the circumference of a circle.

Back

Arc

Front

Line that touches the edge of the circle at exactly one point.

Back

Tangent Line

Front

A point in the middle of the circle that is the same distance from any point on the edge of the circle.

Back

Center

Front

Distance from the center of a circle to any point on the edge.

Back

Radius

Front

Distance from one point on the edge of a circle to another point on the edge of a circle but does not pass through the center.

Back

Chord

Front

The longest distance across a circle, passing through the center.

Back

Diameter

Front

A region of a circle bounded by two radii and the arc between them.

Back

Sector

Front

An angle whose vertex is at the center of the circle and whose sides are radii.

Back

Central Angle

Front

The distance around the circle.

Back

Circumference

Front

The area contained within a circle.

Back

Area of Circle = πr²