Intro to Circles Vocabulary

The set of all points equidistant from a center point.

• circle

• radius

• diameter

• chord

A segment starting at the center of a circle and ending on the circle.

• circle

• radius

• diameter

• chord

A segment with both endpoints on the circle going through the center of the circle.

• circle

• radius

• diameter

• chord

A segment with both endpoints on the circle.

• circle

• radius

• diameter

• chord

Angle with its vertex at the center of a circle

• central angle

• inscribed angle

• circumference

• area

Angle with its vertex on the circle and both endpoints on the circle.

• central angle

• inscribed angle

• circumference

• area

Length around a circle.

• central angle

• inscribed angle

• circumference

• area

Amount of space inside a circle.

• central angle

• inscribed angle

• circumference

• area

𝜋r²

• area

• circumference

• arc length

• arc measure

2𝜋r

• area

• circumference

• arc length

• arc measure