When the sides of a triangle are extended the three original angles of the triangles?

When the sides of a triangle are extended, the original angles of the triangle remain unchanged. However, new angles are formed at the points where the extensions intersect with the lines that make up the triangle. These new angles, known as exterior angles, are supplementary to the original angles, meaning that each exterior angle is equal to the sum of the two opposite interior angles of the triangle. Thus, the relationships among the angles are maintained even with the extensions.