Is it always true, sometimes true, or never true that the centroid is outside its associated triangle?

Question

Is it always true, sometimes true, or never true that two complementary angles have a common vertex?

Answer 1

always; sometimes

Answer 2

Is this statement always true, sometimes true, or never true? give angle ABC and DEF, if angle A = angle D, angle B = angle E, and angle C = angle F, then angle ABC is congruent to angle DEF