Parts of a Circle

Front

What is a line segment connecting any two points on a circle called?

Back

Chord

Front

What is the diameter of a circle?

Back

The longest chord of a circle, which passes through the center.

Tags

CCSS.HSG.C.A.2

Front

What does 'circumference' refer to in relation to a circle?

Back

The distance around a circle.

Front

What is the distance from the center of the circle to any point on the circle called?

Back

Radius

Front

Is the line segment that connects the center of the circle to a point on the circle a radius or diameter?

Back

Radius

Front

How is the diameter related to the radius?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

What is the formula for calculating the circumference of a circle?

Back

C = πd or C = 2πr, where d is the diameter and r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle?

Back

A = πr², where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is a secant line in relation to a circle?

Back

A line that intersects a circle at two points.

Front

What is a tangent line in relation to a circle?

Back

A line that touches the circle at exactly one point.