parts of a circle

Front

What is the center of a circle?

Back

The point that is equidistant from all points on the circle.

Front

What is a radius?

Back

A line segment from the center of the circle to any point on the circle.

Front

What is a diameter?

Back

A line segment that passes through the center of the circle and has its endpoints on the circle.

Front

What is a chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is an arc?

Back

A portion of the circumference of a circle.

Front

What is a tangent?

Back

A line that touches the circle at exactly one point.

Front

What is a secant?

Back

A line that intersects the circle at two points.

Front

What is a point of tangency?

Back

The point where a tangent touches the circle.

Front

What is a segment of a circle?

Back

The region bounded by a chord and the arc connecting its endpoints.

Front

What is the relationship between the radius and diameter?

Back

The diameter is twice the length of the radius.