They equal the supplement of the interior angle it is adjacent to. (180-int. angle) E.g: the exterior angles of an equilateral triangle are each equal to 120 degrees.
you might want the answer to this so that it could help you answer:Do you use addition or subtraction when you figure out an exterior angle?.
so here i go.
it is:the outside of a triangle, but is...
When any side of triangle is extended outwards then exterior angle is formed. Sum of this exterior angle and adjacent interior angle = 180o.If exterior angle = 180o(straight angle) then interior...