Theorem 6.19 is a statement in geometry, which states that:
In any triangle, the measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.
The remote interior angles are the two interior angles that are not adjacent to the exterior angle. In other words, if we extend one side of a triangle, the angle formed outside the triangle on the adjacent side is equal to the sum of the measures of the other two interior angles of the triangle.
theorem 6-19
description/definition
1 answer