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If the length of the round edge of a piece of pie is identical to the length of the two straight sides of the piece of pie, the angle between the two straight sides is 1 radian.

An angle of 1 radian results in an arc with a length equal to the radius of a circle. A radian is equal to an angle of approximately 57.295 degrees at the center of a circle between two radii separated at the circumference by an arc equal in length to the radius.

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14y ago

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