Which theorem states that 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?

(Line and Angle Relationships Unit Test)
conexxese

2 answers

It should be Dr WHAT. What are your choices?
I'd say it is the one which states

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