Circles Review 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

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

A bike wheel has a diameter of 10 ft. What is the circumference of the wheel?

• 10π feet 
• 3.14π feet
• 3.14 feet

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

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

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet? Leave in terms of π.

• A = 2π
• A = 8π
• A = 10π
• A = 4π

∠ABC is a ________ 

• Minor Arc
• Major Arc
• Semicircle
• Inscribed Angle

An arc whose measure is between 180° and 360°

• Minor Arc
• Semicircle
• Major Arc
• Central Angle

∠BAC is a ________ angle

• major
• central
• inscribed
• obtuse