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Definitions, Properties, and Postulates (Unit 3)

Across
If angles are complementary, then their measure add to 90 degrees.
Divides the angle (or segment) into two congruent angles (or segments)
If D is a point in the interior of <ABC, then m<ABD + m<DBC = m<ABC
A pair of adjacent angles formed by intersecting lines.
Compliments of the same angle, or congruent angles, are congruent.
A quantity may be substituted for its equal in any expression.
A quantity is congruent (equal) to itself. a = a
A quantity may be substituted for its equal in any expression.
If a point is the midpoint of a segment, then it divides the segment into two congruent parts.
If B is between A and C, then AB + BC = AC
If two angles are vertical angles, then they are congruent.
Down
If a = b and b = c, then a = c
Angles opposite each other formed when two lines cross.
If a(b+c), then ab + ac
If two angles form a linear pair, they are supplementary.
Supplements of the same angle, or congruent angles, are congruent.
If angles are supplementary, then their measure add to 180 degrees.
If a = b, then b = a
Angles opposite each other formed when two lines cross.
If equal quantities are divided by equal quantities, the quotients are equal