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Radians and degrees are two units for measuring angles. Most of the unit that we use to measure angles is degrees, but sometimes we will also use radian measure.
That is why we need to know how to convert degrees in radian measure and vice versa.
In this case, we will convert degrees in radian measure.
Take note, that 1 complete revolution is 360° or 2π in radian measure.
Therefore, 180° is equal to π in radian measure.
This is what we use to convert degrees to radians.
240° × π/180° = 4π/3

Therefore, 4π/3 is the radian measure equivalent to 240°.
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