Circles Review (B2A)

What is the formula for circumference of a circle?

• C = d⋅π
• C = 2⋅π⋅r
• C = π⋅r²
• C = d⋅π and
  C = 2⋅π⋅r

What is the formula for area of a circle?

• A = π⋅r²
  
• A = d⋅π
• A = 2⋅π⋅r
• A = 2⋅r

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

The radius of a circle is 3 cm.  What is the circle's diameter?

• 9.4 cm
• 6 cm
• 18.8 cm

The diameter is two times the radius

• True
• False

A line segment whose endpoints are on the circumference.

• Diameter
• Tangent
• Secant
• Chord

What is the green line called?

• Circle

• Radius

• Diameter

• Circumference

What is the blue line called?

• Circle

• Radius

• Diameter

• Circumference

The distance around the perimeter of a circle is called

• Circle

• Radius

• Diameter

• Circumference