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- Geometry TEST 1 DEFINITIONS

Brittany R.

Statement

Words and symbols that make a claim that is either true or false

Complementary angles

Two angles with a sum of 90. Each angle in the pair is known as the complement of the other angle.

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Supplementary Angle

Two angles are (. ) if the sum of their measures is 180.

Vertical angles

nonadjacent angles that are formed by 2 intersecting lines

Bisector of an angle

the ray that separates the given angle into two congruent angles

Congruent angles

two angles with the same measure

Adjacent angles

Two angles are (. ) if they have a common vertex and a common side between them

Angle

the union of two rays with a common endpoint

Parallel lines

lines that lie in the same plane but do not intersect

Ray

(. ) AB is the union of line segment AB and all points X on AB such that B is between A and X

Midpoint

the point that separates the line segment into two congruent parts

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Congruent line segments

two line segments that have the same length

Distance

The (. )between two points A snd B is the length of the line segment AB that joins the two points

Postulate

a statement that is assumed to be true

Line segment

the subset of a line that contains two points known as endponts and all the points between them.

Scalene triangle

a triangle in which no two sides are congruent

Isosceles triangle

a triangle that has two congruent sides

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