Circle Vocabulary Practice

The distance around the circle; it can be calculated using the formula C=2πr, where r is the radius.

• Circle

• Area

• Circumference

• Radius

A chord whose end points are on the circle and passes through the center; it is twice the length of the radius.

• Circle

• Radius

• Diameter

• Secant

1. A line segment from the center of the circle to a point on the circle; half of the diameter.

• diameter

• radius

• chord

• line segment

1. A line segment whose endpoints lie on the circle; it does not have to pass through the center.

• radius

• diameter

• chord

• secant

Label the correct parts of the circle

a

b

c

d

Center

Arc

Semi Circle

Secant

Tangent

Diameter

Chord

Radius

An ​ (a)   is a portion of the edge of a circle. It's defined by 2 end points.

• arc
• radius
• diameter
• secant
• tangent

A ​ (a)   is an angle whose ​ vertex is at the center of the circle and whose sides are radii.

• central angle
• radius
• diameter
• secant
• tangent

An ​ (a)   is an angle with it's vertex on the circle and it's sides being chords

• inscribed angle
• central angle
• acute angle
• angle

Match the correct vocabulary word it it's image

• Inscribed Angle

• 
• Major Arc

• 
• Minor Arc

• 
• Central Angle

• 
• Chord

• 

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2