Answer:
The measure of the angle is -60° ⇒ last answer
Explanation:
To convert an angle of measure x radian to degree multiply x by

To convert an angle of measure x degree to radian multiply x by
∵ The measure of the angle is
radian
- To change it to degree multiply it by

∴ The measure in degree is
×

- Simplify it by dividing up and down by π
∴ The measure in degree is

∴ The measure in degree is -60°
The measure of the angle is -60°