Key Terms Circle

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Identify the angle highlighted in pink

• center of the circle

• minor arc

• central angle

• inscribed angle

Tags

G.GCI.4

G.GCI.2

A set of points on a flat surface (plane) with every point equidistant (the same distance) from a given point called the center.

• chord

• circle

• radius

• diameter

• circumference

Match the following vocabulary term with its appropriate part of the circle.

• Major Arc

• Line PR

• Point of Tangency

• Semi-Circle

• Secant Line

• Point V

• Minor Arc

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the circle

What is O?

• diameter

• radius

• center

• chord

What is the radius?

• 5

• 2.5

• 10

The distance halfway across the circle is called the...

• radius

• diameter

• circumference

• area

Which number best represents a radius?

• 1

• 2

• 6

• 9

The radius is __________ the diameter

• Half

• Double

• Equal to

• The area of

Tags

CCSS.HSG.C.A.2