Unit 10 Vocabulary

Front

What is the definition of a circle?

Back

A circle is the set of points equidistant from a given point, known as the center.

Front

What is a tangent line in relation to a circle?

Back

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

Front

What is the center of a circle?

Back

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

Front

What is a radius in a circle?

Back

A radius is a segment with endpoints at the center of the circle and any point on the circle.

Front

What is an arc in a circle?

Back

An arc is a portion of the edge of the circle defined by two endpoints.

Tags

CCSS.HSG.C.B.5

Front

What is the diameter of a circle?

Back

The diameter is a segment that passes through the center of the circle and has endpoints on the circle, and it is twice the length of the radius.

Tags

CCSS.HSG.C.A.2

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.

Tags

CCSS.7.G.B.4

Front

What is a chord in a circle?

Back

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

Front

What is the relationship between the radius and diameter?

Back

The diameter is twice the length of the radius (d = 2r).

Tags

CCSS.7.G.B.4

Front

What is a sector of a circle?

Back

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