Circle Vocabulary

Front

What is a minor arc?

Back

A minor arc is an arc that is smaller than a semicircle, typically defined by two endpoints on the circle.

Front

How many degrees are there in a circle?

Back

360 degrees.

Front

What is a chord in a circle?

Back

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

Front

What is a tangent line?

Back

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

Front

What is a secant?

Back

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

Front

What is a diameter?

Back

A diameter is a chord that passes through the center of the circle, dividing it into two equal halves.

Front

What is a sector of a circle?

Back

A sector is the region enclosed by two radii and the arc between them.

Front

What is a semicircle?

Back

A semicircle is an arc that represents half of a circle, measuring 180 degrees.

Front

What is the relationship between a radius and a diameter?

Back

The diameter is twice the length of the radius.

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as C = 2πr, where r is the radius.