Respuesta :
First choice, remote interior angles.
The interior and exterior angles will add to 180 as will the three angles in the triangle. so the other two interior ones add to the exterior in play.
The two angles measured to get the external angle of a triangle is the remote interior angles.
Exterior angle of a triangle theorem
The exterior angle theorem states that when a triangle's side is extended, the resultant exterior angle formed is equal to the sum of the measures of the two opposite interior angles of the triangle.
The remote interior angles are the two angles on the inside of the triangle that are not in any way in contact with the exterior angle.
The sum of the remote interior angles is equals to the measure of the external angle of the triangle.
learn more on exterior angle of triangle theorem here: https://brainly.com/question/2125016
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