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  1. 3π radians is equal to
    5
    1. 100°
    2. 120°
    3. 108°
    4. 180°
Correct Option: C

Using Rule 1,
∵ π radian = 180°

∴ 3π radian =
180
 ×
3π
 ×
3π

5π5

= 108°


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