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vertical angle
one of two opposite and equal angles formed by the intersection of two lines.
Source: Dictionary.com
vertical angle | Define vertical angle at Dictionary.com
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Vertical Angles - Math is Fun


Vertical Angles are the angles opposite each other when two lines cross. " Vertical" in this case ... The interesting thing here is that vertical angles are equal:  ...

Intro to vertical angles | Vertical, complementary, and supplementary ...


By using our knowledge of supplementary, adjacent, and vertical angles, we can solve problems involving the intersection of two lines. Including this one!

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.

Vertical Angles in Geometry: Definition & Examples - Video ...


After completing this lesson, you will be able to identify and draw vertical angles. You will also be able to state the properties of vertical...

Complementary, Supplementary, and Vertical Angles - AlgebraLAB


Complementary angles are two angles with a sum of 90º. Supplementary ... Vertical angles are two angles whose sides form two pairs of opposite rays. We can ...

Vertical Angles: Definition, illustrated examples, and an interactive ...


Vertical angles explained with examples , pictures, an interactive program and a practice quiz.

Vertical Angles Theorem - Basic mathematics


What is vertical angles theorem? Explanations and proof on this site.

Vertical Angles - MathBitsNotebook (Geo - CCSS Math)


Vertical angles are located across from one another in the corners of the "X" formed by two straight lines. In the diagram at the right, lines m and n are straight: