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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.

Types of Angles - RegentsPrep

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 Triangles - RegentsPrep

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

An Isosceles Triangle has two congruent sides. The sides that are the same length are called the legs. The other side is called the base. An Equilateral Triangle ...

Parallel Lines, and Pairs of Angles - Math is Fun

www.mathsisfun.com/geometry/parallel-lines.html

Parallel Lines, and Pairs of Angles. Parallel Lines. Lines are parallel if they are always the same distance apart (called "equidistant"), and will never meet.

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 ...

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 ...

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 ...

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.

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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.

Angles with Parallel Lines - RegentsPrep

www.regentsprep.org

When lines intersect, angles are formed in several locations. Certain angles are given ... If two parallel lines are cut by a transversal, the alternate interior angles are congruent. ... Vertical angles are ALWAYS equal, whether you have parallel ...

Congruent Angles - Math is Fun

www.mathsisfun.com

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"?