Explanation: Exterior angle of a triangle is formed by extending one of the sides of the triangle. Each exterior angle in a triangle has two remote interior angles. These two angles are the two angles in the triangle that are not adjacent to this exterior angle In the given triangle: Angles of the triangle are: angles 2,3 and 4 The exterior angle under study is: angle 1 The adjacent angle to angle 1 from the angles of the triangle is angle 4 Therefore, the remote exterior angles to angle 1 will be the other two angles in the triangle which are angles 2 and 3
