Always, Sometimes, Never. never. Theorems are reversible. STUDY. Vertical angles are congruent..or equal in measure Just the same angle. sometimes. True or false vertical angles are always congruent. Vertical angles are always equal in measure, they are very special angle and they are congruent to one another. Add your answer and earn points. That is all. Any two angles with the same angle measurement are considered congruent by definition. 1 See answer zuziolacamons is waiting for your help. Suppose $\alpha$ and $\alpha'$ are vertical angles, hence each supplementary to an angle $\beta$. Opposite rays are collinear rays with a common endpoint and extend in the same direction. Key Terms Vertical angles are congruent. PLAY. Vertical angles are always congruent, but congruent angles do not have to be vertical. Look at the figure below where the lines intersect and the angles formed.You can see that the opposite angles are congruent. Now vertical angles are defined by the opposite rays on the same two lines. Since $\beta$ is congruent to itself, the above proposition shows that $\alpha\cong\alpha'$. True or false obtuse angles do not have complements. d. congruent only when they are both acute angles. Supplementary angles are congruent. They don't have to point in the same direction. Congruent Angles Congruent Angles have the same angle (in degrees or radians). always. Vertical angles are non-adjacent angles and they are formed when 2 lines intersect. https://www.mathwarehouse.com/geometry/angle/vertical-angles.php Finally, vertical angles are always congruent. 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. always. Whenever two lines intersect, they form two pairs of vertical angles. b. always congruent. Vertical angles have a common vertex, but they are never adjacent angles. Aliza121 Aliza121 Check it out! Vertical angles are a. never congruent. They don't have to be on similar sized lines. In vertical angles, all the pairs of the angles are opposite each other. vertical angles are always congruent...they are two nonadjacent angles formed by intersecting lines. c. congruent only when they are both obtuse angles. True or false the acute angles in a right triangle must be complementary. In the above given figure you can see two parallel lines are intersected by a transversal. These angles are congruent. 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}. Definitions are reversible. Where the lines intersect figure below where the lines intersect answer zuziolacamons is waiting for help... 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