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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

A Scalene Triangle has no congruent sides. ... The sides that are the same length are called the legs. ... An Equiangular Triangle has 3 congruent angles.

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 ...

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.

Quadrilaterals - Developmental Math Topic Text

www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_RESOURCE/U07_L2_T1_text_final.html

These quadrilaterals are called parallelograms They take a variety of shapes, but one ... They would never intersect because they are parallel. Notice, also, that the opposite angles of a parallelogram are congruent, as are the opposite sides.

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.

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 ...

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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 ...

Vertically Opposite Angles - Math is Fun

www.mathsisfun.com

Vertically Opposite Angles are the angles opposite each other when two lines cross. "Vertical" in ... (in fact they are congruent angles) ... Angles a° and c° are also vertical angles, so must be equal, which means they are 140° each. ... Language Note: "Vertically Opposite Angles" are usually called Vertical Angles ...