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Are vertical angles always complementary?
Vertical angles are not always complementary. In some cases, they will congruent and supplementary which makes them add up to 180 degrees.
What is a counter example for the statement congruent angles are always vertical angles?
Vertical angles must necessarily be congruent, however congruent angles do not necessarily have to be vertical angles. An example of congruent angles which are not vertical angles are the 3 interior angles of an equilateral triangle. These angles do not share the same vertex yet they are congruent.
What two angles are congruent and supplementary to each other?
supplementary angles are equal to 180 degrees. so two congruent(same) angles would be 90 degrees!
Uses of parallel lines cut by a transversal?
There's lots of useful things you can discover when parallel lines are cut by a transversal, most of them having to do with angle relationships. Corresponding angles are congruent, alternate interior angles are congruent, same side or consecutive interior angles are supplementary, alternate exterior angles are congruent, and vertical angles are congruent.
What angles are always congruent?
vertical angles
