Module 6 Day 1 Live Practice: Lengths of Arcs

Module 6 Day 1 Live Practice: Lengths of Arcs

Find the arc length of AB, leaving the answer in terms of

 $\pi$  

(30 seconds to get started; answer choices and timer on the next slide to finish)

Multiple Choice

Which is the length of the arc, in terms of

 $\pi$  ?

• 2 $\pi$  

• 3 $\pi$  

• 4 $\pi$  

• 8 $\pi$  

 $\frac{45\cdot2\cdot\pi\cdot12}{360}$  = $\frac{1080}{360}\pi$  

reduces to  $3\pi$  

Multiple Choice

Using  $\pi=\ 3.14,$  What is the decimal value of the length,

 $3\pi$  , to the nearest tenth?

• 9.1

• 9.4

• 6.1

• 12.1

Find the arc length of AB if the diameter of this circle is 14 cm

(30 seconds to get started, answer choices and timer on the next slide)

Multiple Choice

If the diameter is 14, which is the arc length of AB in terms of

 $\pi$  ?

•  $10\pi$  

•  $7\pi$  

•  $\frac{14}{5}\pi$  

•  $\frac{7}{3}\pi$  

 $\frac{60\cdot2\cdot\pi\cdot7}{360}=\frac{120\cdot\pi\cdot7}{360}$  
Reducing  $\frac{120}{360}=\frac{1}{3}\rightarrow$   $\frac{1\cdot\pi\cdot7}{3}=\frac{7}{3}\pi$  

Multiple Choice

Using  $\pi=3.14,$  what is the decimal value of the length,

 $\frac{7}{3}\pi$  , to the nearest tenth?

• 7.3

• 2.3

• 5.8

The End!!!

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