a circle has a circumference of 20. It has an arc length of 4, what is the central angle of the arc in degrees?
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Answer:
Step-by-step explanation:
To find the length of an arc,
Angle/360 * circumference
Length = 4
Angle = ?
circumference = 20
Angle/360 * 20 = 4
Rearrange to find the Angle.
Angle/360 = 4 / 20 = 0.2
Angle = 360 * 0.2