Warm Up Arc length

What does "circumference" mean?

• Space a circle takes up

• Distance around a circle

• Line from one side of a circle to another

• Line from center of circle to side

What is the formula for circumference of a circle given the diameter?

• C = pi x r
• C = pi x 2r
• C = pi x D
• C = pi x 2D

What is the formula for circumference of a circle given the radius?

• C = pi x r
• C = pi x 2r
• C = pi x D
• C = pi x 2D

Find the arc length of the bolded arc in the picture.

• A
• B
• C
• D

Find the length of the radius given the arc length of arc AB shown. Round your answer to the nearest tenth.

• 53.4 cm

• 154.3 cm

• 24.6 cm

• 12.8 cm

Find the arc length. Round to the nearest tenth. DO NOT FORGET YOUR UNITS.

• 33.0 yd

• 16.5 ft

• 33.0 ft

• 17.8 yd

Find the arc length.  Leave your answer in terms of π.

• 7/4π
• 7/2π
• 1/8π
• 45π

Segment HF is a ​ (a)  

• Chord
• Tangent
• Diameter
• Secant
• Radius