Circle Vocab

Front

What is a secant in a circle?

Back

A secant is a line that intersects a circle at two points.

Front

What is the definition of a radius?

Back

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

Front

What is the diameter of a circle?

Back

The diameter is a line segment that passes through the center of the circle and has its endpoints on the circle.

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle.

Front

What is a tangent in relation to a circle?

Back

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

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius (Diameter = 2 × Radius).

Front

What is the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the center of a circle?

Back

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

Front

What is a chord in a circle?

Back

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