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Transversal (geometry)

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

In geometry, a transversal is a line that passes through two lines in the same plane at two ... that cuts two parallel lines at right angles is called a perpendicular transversal. ... Further, if th...

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.

Angles with Parallel Lines - Regents Exam Prep Center

www.regentsprep.org/regents/math/geometry/gp8/lparallel.htm

These names describe angles whether the lines involved are parallel or not parallel. Remember that: ... If two parallel lines are cut by a transversal, the alternate interior angles are congruent. ... Vertical angles are ALWAYS equal, whether you

Types of Angles - Regents Exam Prep Center

www.regentsprep.org/regents/math/geometry/gp5/langles.htm

An angle is the intersection of two rays with a common endpoint. ... They are always equal in measure. <1 and <3 are vertical angles. <2 and ... THEOREM: Complements of the same angle, or congruent angles, are congruent. Supplementary ...

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

study.com/academy/lesson/types-of-angles-vertical-corresponding-alternate-interior-others.html

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.

Pairs of Angles | WyzAnt Resources - Tutors

www.wyzant.com/resources/lessons/math/geometry/lines_and_angles/pairs_of_angles

Another special pair of angles is called supplementary angles. One angle is said to be the ... Vertical angles always have equal measures. ?JKL and ?MKN are ...

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.

Angle pairs formed by parallel lines cut by a transversal - Math

www.math10.com/en/geometry/angles/angles.html

When two parallel lines are cut by a third line, the third line is called the transversal. In the example below, ... Recall that all pairs of vertical angles are congruent.

Cool math .com - Types of Triangles

www.coolmath.com/reference/triangles-types

Since the sum of the angles of a triangle is always 180 degrees... y + z = 90 degrees. The two sides of the triangle that are by the right angle are called the legs... ... all the sides are the same length (congruent) and all the angles are the same ...

Classifying Three Types of Triangles - For Dummies

www.dummies.com/how-to/content/classifying-three-types-of-triangles.html

However, you can't always assume this when you're doing tricky geometry ... The two angles touching the base (which are congruent, or equal) are called base ...

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

www.mathplanet.com

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.

Congruent Angles - Math is Fun

www.mathsisfun.com

Congruent Angles have the same angle (in degrees or radians). That is all. Congruent Angles These angles are congruent. They don't have to point in the same ...

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

math.stackexchange.com

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 ...