Question

write the term that best completes each statement. 1. the interior angles of a triangle is 180°. 2. the states that 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 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 the 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 triangle angle - sum property.
2. The exterior angle of a triangle being equal to the sum of the two non - adjacent interior angles is the exterior angle theorem.
3. When we extend a side of a polygon, the angle formed is called an exterior angle.

Answer:

1. Triangle angle - sum property
2. Exterior angle theorem
3. Exterior angle