WebSearch - Vertical Angles

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Vertical Angles: Definition, illustrated examples, and an ...
Click and the points below to see the rule for vertical angles in action. m X in the diagram on the left is 157° since its vertical angle is 157° ...

http://www.mathwarehouse.com/geometry/angle/vertical-angles.php

Vertical angles - Wikipedia, the free encyclopedia
In geometry, a pair of angles is said to be vertical (or opposite) if the angles are formed from two intersecting lines and the angles are not adjacent. ...

http://en.wikipedia.org/wiki/Vertical_angles

Vertical Angles
The interesting thing here is that vertical angles are equal: ... Note: They are also called Vertically Opposite Angles, which is just a more exact way of saying the same thing. ...

http://www.mathsisfun.com/geometry/vertical-angles.html

Vertical Angles definition - Math Open Reference
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. ...

http://www.mathopenref.com/anglesvertical.html

Pairs Of Angles
Pairs of Angles - relationships of various types of paired angles. ... Some examples are complementary angles, supplementary angles, vertical angles, alternate interior angles, ...

http://www.onlinemathlearning.com/pairs-of-angles.html

Mathwords: Vertical Angles
In the diagram below, angles 1 and 4 are vertical. So are angles 2 and 3. Vertical angles are angles opposite one another at the intersection of two lines. ...

http://www.mathwords.com/v/vertical_angles.htm

Vertical Angles
Vertical Angles - relationships of various types of paired angles.

http://www.onlinemathlearning.com/vertical-angles.html

YouTube - Vertical Angles - a proof on video
Showing a short and easy proof why vertical angles are equal.

http://www.youtube.com/watch?v=_8uTO3mYO-g

Angles and angle terms
Geometry help with angles, angle terms, and basic angle concepts. Brought to you by Math League Multimedia.

http://www.mathleague.com/help/geometry/angles.htm

Intermediate Test Prep Math 8 (Grade 8) Vertical Angles:Lesson
the vertical angles formed are equal in measure. Let's look at the diagram again and see how this works.... Let's assume that the measure of angle y is 420 ...

http://www.studyzone.org/mtestprep/math8/g/8verticalanglesl.cfm