Circles Basics

Which of the following names a diameter?

What is the part of the circle highlighted in red called?

• semi-circle arc

• major arc

• minor arc

• sector

An angle whose vertex lies on the circle and whose sides are chords of the circle

• inscribed angle 

• central angle

• arc

• radius

An angle whose vertex is the center of a circle

• central angle

• inscribed angle

• minor arc

• major arc

Label each of the following.

d

c

b

a

Tangent

Chord

Radius

Secant

Match the items to the proper parts of this image

a

b

c

Diameter

Tangent Line

Secant

• C:(4, -2), r=5

• C:(-4, 2), r=5

• C:(4, -2), r=25

• C:(-4, 2), r=25

Write the Standard Equation for a circle with a center (-2,5) and radius 7

• (x+2)² + (y-5)² = 49

• (x+9)² + (y-6)² = 49

• (x+2)² + (y-5)² = 32

What is the equation of the circle?

• (x+1)² + (y +1)² = 3

• (x+1)² + (y -1)² = 3

• (x+1)² + (y +1)² = 9

• (x-1)² + (y -1)² = 9

Which of the following names the circle?

• Circle DC

• Circle D

• Circle AC

• Circle ADC