Circles Review- Math 2

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

A circle's diameter is 13 cm.  What is the approximate circumference?  

• 6.5 cm
• 13 cm
• 40.8 cm 
• 20.4 cm 

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

• 9.4 cm
• 6 cm
• 18.8 cm

Find the area of the circle

• 43.96

• 153.94

• 87.82

• 307.72

Determine the radius of the penny

• 59.66 mm
• 9.5 mm
• 38 mm
• 119.32 mm

A segment with one endpoint at the center & the other endpoint on the circumference

• Diameter
• Radius
• Chord
• Tangent

A line segment whose endpoints are on the circumference.

• Diameter
• Tangent
• Secant
• Chord

What is the measure of ∠AOB?

• 40°
• 80°
• 160°
• 50°

What is the measure of ∠ABC?

• 82°
• 41°
• 164°
• 64°