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Linear Pair Theorum: If two angles form a linear pair, then they are supplementary. See proof. Vertical Angle Theorum: If two angles are vertical angles, then they have equal measures. See proof.
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library.thinkquest.org/2647/geometry/angle/measure.htm
library.thinkquest.org/2647/geometry/angle/measure.htm
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Given two intersecting lines, the two angles opposite each other have the same measure and are congruent.
http://wiki.answers.com/Q/What_is_the_vertical_angle_th...
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Use the theorem that vertical angles are congruent to find the value of x in the problems below. ; ... ; Vertical Angle problems can also involve algebraic expressions. To find the value of x, set the two vertical angles equal then solve the equation: x+5=2x-3 x=8...
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www.mathwarehouse.com/geometry/angle/vertical-angles.ph...
www.mathwarehouse.com/geometry/angle/vertical-angles.php
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This lesson covers the idea of vertical angles. Students learn the definition of vertical angles and the vertical angle theorem, and are asked to find the measures of vertical angles using Algebra. Students also solve two-column proofs involving vertical angles.
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www.yourteacher.com/geometry/verticalangles.php
www.yourteacher.com/geometry/verticalangles.php
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The picture above is a screenshot from our lesson on vertical angle theorem. The complete lesson includes video examples, interactive practice, multiple-choice self-tests, and more! To access this lesson, sign up now!
http://www.yourteacher.com/geometry/verticalangletheore...
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Conjecture (Vertical Angle Conjecture ): If two angles are vertical, then they are equal in measure. ... Vertical Angles Conjecture ... Vertical angles are non-adjacent angles formed by a pair of intersecting lines. You can think of them as the opposite angles that appear in the "bow-tie" formed when two lines intersect.
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www.geom.uiuc.edu/~dwiggins/conj01.html
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Theorem: Vertical angles are always congruent. ... 1 and 2 form a linear pair, so by the Supplement Postulate, they are supplementary. That is, ... Subtracting m 2 from both sides of both equations, we get...
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www.hotmath.com/hotmath_help/topics/vertical-angles-the...
www.hotmath.com/hotmath_help/topics/vertical-angles-theorem.html
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They also include the proof of the following theorem as a homework exercise. You can expect to often use the Vertical Angle Theorem, Transitive Property, and Corresponding Angle Theorem in your proofs.
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www.andrews.edu/~calkins/math/webtexts/geom05.htm
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Dictionary: vertical angle ... WordNet: vertical angle ... The vertical angle theorem states that vertical angles are?
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www.answers.com/topic/vertical-angle
www.answers.com/topic/vertical-angle
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