Section 10.1 - Circle Parts

Front

What is a circle?

Back

A circle is a shape consisting of all points in a plane that are at a given distance from a fixed point, called the center.

Front

What is the radius of a circle?

Back

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

Front

What is a diameter?

Back

The diameter is a straight line passing from side to side through the center of a circle, and it is twice the length of the radius.

Front

What is a chord in a circle?

Back

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

Front

Can a chord be longer than the diameter?

Back

No, a chord cannot be longer than the diameter of the circle.

Front

What is the relationship between the radius and diameter?

Back

Front

What is the circumference of a circle?

Back

Front

What is the area of a circle?

Back

Front

What is the center of a circle?

Back

The center is the fixed point from which all points on the circle are equidistant.

Front

What is a tangent to a circle?

Back

A tangent is a line that touches the circle at exactly one point.