Digital PSAT Math Practice Question 46: Answer and Explanation
Question: 46
If a circle has a radius of 3 units, what is the length in units of the arc on the circle that measures 
radians?
- A. π
- B.
- C.
- D. 7π
Correct Answer: B
Explanation:
(B) A measure of 
radians corresponds to 
of the distance around the circle since 2π radians is the entire distance around the circle. First find the circumference of a circle with radius of 3:
Then calculate 
of the circumference:
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