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