how many degrees are there in each exterior angle of an equilateral triangle? ?
The three interior angles of this type of triangle are all 60 degrees, by definition. Therefore, the exterior angles are the supplements of that, or: 180 - 60, which is: 120 degrees. Here is another reference: http://mathforum.org/~sanders/geometry/GP06AnglesPolygon.html. Let me know if you have any questions. If not, please press Accept. Thanks!-Scott