en.wikipedia.org/wiki/Transversal_(geometry)

In geometry, a transversal is a line that passes through two lines in the same plane at two ... If the two angles of one pair are congruent (equal in measure), then the angles of each of the other ... This contradicts Proposition 16 which states that an exterior angle of a triangle is always greater than the opposite interior angles.

socratic.org/questions/what-types-of-angles-are-always-congruent

Jul 28, 2016 ... Right angles (90^o) Straight angles (180^o) Complete angles (360^o) See below ... Any pair of angles measured the same in some ...

www.mathopenref.com/anglesvertical.html

As can be seen from the figure above, when two lines intersect, four angles are formed. Each opposite pair are called vertical angles and are always congruent.

www.mathopenref.com/congruentangles.html

Angles are congruent if they have the same angle measure in degrees. They can be at any orientation on the plane. In the figure above, there are two congruent ...

www.mathsisfun.com/geometry/congruent-angles.html

Congruent Angles have the same angle (in degrees or radians). That is all. ... the same angle. Congruent - why such a funny word that basically means "equal"?

www.khanacademy.org/math/geometry-home/geometry-angles/geometry-vert-comp-supp/v/proof-vertical-angles-are-equal

Proving that vertical angles are equal. ... Prepare with these 8 lessons on Angles. ..... What makes an angle congruent to each other? ..... vertical angle --so, angle DBA-- then I'd prove that vertical angles are always going to be equal, because ...

www.mathplanet.com/education/pre-algebra/introducing-geometry/angles-and-parallel-lines

Vertical angles are always congruent, which means that they are equal. Adjacent angles are angles that come out of the same vertex. Adjacent angles share a ...

www.algebra.com/algebra/homework/Rectangles/Rectangles.faq.question.694152.html

SOLUTION: 1. are supplementary angles adjacent. sometimes, always or never. 2. congruent angles are supplementary. sometimes, always, never.

www.quora.com/Which-angles-are-always-congruent-Why

If you mean the radius angle - the one described usually as being beetween it is said to be congruent because when you add to any angle , the ...

math.stackexchange.com/questions/286114/explain-why-vertical-angles-must-be-congruent

Recall that if ∠BAC and ∠BAD are supplementary angles, and if ∠B′A′C′ and ∠B′A′D′ are supplementary angles, and if ...