Because once you have gone all the way around an object, you are back to where you started making a 360 degree turn, which means all the way around.
Chat with our AI personalities
The sum of the exterior angles of a polygon is equal to 360 degrees.
The sum of the exterior angles of ANY polygon is 360 degrees.
The sum of the exterior angles of ANY polygon is 360 degrees.
The sum of the exterior angles of any polygon is 360 degrees.
Sum of the exterior angles is 360 degrees. So the sum of the interior angles must be 3*360 = 1080 degrees.