Question

write the term that best completes each statement. 1. the sum of the measures of the interior angles of a triangle is 180°. 2. the measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles of the triangle. 3. the two angles that are non - adjacent to the specified exterior angle are the two angles that are non - adjacent to the specified exterior angle. 4. a(n) ___ is formed by extending a side of a polygon. remember the sum of the measures of the interior angles of a triangle is 180°. the measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles of the triangle.

Explanation:

1. The sum of the measures of the interior angles of a triangle being 180° is a well - known geometric fact.
2. The exterior angle of a triangle being equal to the sum of the measures of the two non - adjacent interior angles is a fundamental geometric theorem.
3. An exterior angle of a polygon is formed by extending a side of the polygon, which is a basic geometric definition.

Answer:

1. Triangle Angle - Sum Theorem
2. Exterior Angle Theorem
3. Exterior Angle