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## Transversal (geometry) - Wikipedia

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

In geometry, a transversal is a line that passes through two lines in the same plane at two ... A transversal that cuts two parallel lines at right angles is called a ... pair of corresponding angle...

## Vertical Angles definition - Math Open Reference

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.

## Congruent Angles - Math Open Reference

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 ...

## Angles and parallel lines (Pre-Algebra, Introducing geometry ...

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

Vertical angles are always congruent, which means that they are equal. ... that are on the opposite sides of the transversal are called alternate angles e.g. 1 + 8.

## Types of Angles: Vertical, Corresponding, Alternate Interior & Others ...

They are defined as a pair of nonadjacent angles formed by only two intersecting lines. They are known as 'Kissing Vs' and always have congruent measures.

## Vertically Opposite Angles - Math is Fun

www.mathsisfun.com/geometry/vertically-opposite-angles.html

(in fact they are congruent angles), vertically opposite a and b ... Angles a° and c° are also vertical angles, so must be equal, which means they are ... Language Note: "Vertically Opposite Angles" are usually called Vertical Angles in the US.

## euclidean geometry - Explain why vertical angles must be congruent ...

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

Jan 24, 2013 ... Explain why vertical angles must be congruent .... The non-adjacent angles are called vertical or opposite . Also, each pair of adjacent angles ...

## Vertical angles are congruent proof | Vertical, complementary, and ...

What I want to do is if I can prove that angle CBE is always going to be equal to its vertical angle --so, angle DBA-- then I'd prove that vertical angles are always ...

## Are vertical angles congruent? | Reference.com

www.reference.com/math/vertical-angles-congruent-e2e1fa473d7df470

In mathematics, vertical angles are always congruent. Vertical angles are the angles ... when two lines intersect. They are called vertical because the angles share.

## Building Blocks - Angles and intersecting lines - In Depth - Math.com

www.math.com/school/subject3/lessons/S3U1L5DP.html

Vertical angles are pairs of angles formed by two intersecting lines. ... in four corresponding pairs that have the same measure, so therefore are congruent. ... area between the two lines that are cut by the transversal, are called interior angles.