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15 Cards in this Set
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 Back
Perpendicular

Lines, rays, or segments, that intersect at a right/ 90? angle.


Angle assumptions:

You cannot assume right angles
You cannot assume if a line is perpendicular 

Complementary Angles

Two angles whose sum is 90?


Supplementary Angles

Two angles whose sum is 180?


complementary/ supplementary theorems

If angles are supplementary to the same angle they are congruent.
If angles are supplementaryn to congruent angles, they are congruent. If angles are complementary to the same angle they are congruent. If angles are complementary to congruent angles they are congruent. 

If a(n) segment/ angle is addeded to 2 congruent segments/ angles, the sums are congruent

Addition Property


If a(n) (congruent) segment/ angle is subtracted from congruent segments/ angles, the differences are congruent

Subtraction property


If segments/ angels are congruent, their like multiples are congruent.

Multiplication Property


If segments/ angles are congruent, their like divisions are congruent.

Division Property


If angles/ segments are congruent to the same/ congruent angles/ segments, they are congruent to eachother.

Transitive Property


Vertical Angles Theorem

Vertical angles are congruent


If <1 is complementary to <2 and <2 is congruent to <3, the <1 is complementary to <3.

Subsitution Property


Opposite rays

Same vertex (endpoint) opposite directions


Vertical angles

Two angles are vertical angles if the rays forming the sides of one and the rays forming the sides of another are opposite rays.


Can vertical angles be assumed?

Yes
