1 See answer zuziolacamons is waiting for your help. vertical angles are always congruent...they are two nonadjacent angles formed by intersecting lines. Key Terms always. Vertical angles are always equal in measure, they are very special angle and they are congruent to one another. b. always congruent. always. True or false obtuse angles do not have complements. sometimes. That is all. Vertical angles are congruent..or equal in measure True or false vertical angles are always congruent. PLAY. These angles are congruent. Check it out! Now vertical angles are defined by the opposite rays on the same two lines. Vertical angles, also known as opposite angles, are opposite angles formed by two intersecting lines.Vertical angles are ALWAYS congruent (angles that have the same measure) and tend to resemble bow ties. Congruent Angles Congruent Angles have the same angle (in degrees or radians). d. congruent only when they are both acute angles. True or false the acute angles in a right triangle must be complementary. Aliza121 Aliza121 Vertical angles are congruent. Always, Sometimes, Never. According to the same-side interior angle theorem, these two angle are always supplementary or the sum of measures of the two angles is equal to {eq}180^\circ {/eq}. They don't have to point in the same direction. Theorems are reversible. Finally, vertical angles are always congruent. Add your answer and earn points. Vertical angles are non-adjacent angles and they are formed when 2 lines intersect. Opposite rays are collinear rays with a common endpoint and extend in the same direction. In vertical angles, all the pairs of the angles are opposite each other. c. congruent only when they are both obtuse angles. Definitions are reversible. Whenever two lines intersect, they form two pairs of vertical angles. Look at the figure below where the lines intersect and the angles formed.You can see that the opposite angles are congruent. 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