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collinear points

points on the same line

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congruent line segment

Line segments that have the same length

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point

a location in space that has no size

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line

a set of points that form a stright path extending in oppsite directions without end

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angle

figure formed by two rays with the same initial point

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geometry

the pure mathematics of points and lines and curves and surfaces

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noncolliear points

are points that do not lie on the same line

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coplanar points

points all in one plane

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intersection

the act of intersecting (as joining by causing your path to intersect your target's path), a place where two or more points meet

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midpoint of a segment

The point that divides a segment into two congruent segments.

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endpoints

points on the ends of line segments

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plane

two dimensional flat surface, extends forever.

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space

contains at least 4 points not in one line

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obtuse angle

an angle between 90 and 180 degrees

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straight angle

an angle of 180 degrees

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opposite rays

two rays with the same initial point that go in opposite directions

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vertex

the point of intersection of lines or the point opposite the base of a figure

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bisector of a segment

a line, segment, ray, or plane that intersects the segment at its midpoint

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acute angle

an angle less than 90 degrees but more than 0 degrees

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congruent angles

Angles that have the same measure

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right angle

the 90 degree angle between two perpendicular lines

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vertical angles

angles are formed opposite of each other when two lines intersect

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bisector of an angle

the ray that divides the angle into two congruent adjacent angles

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perpendicular lines

two lines that meet and form a right angle

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noncoplaner points

points that are not in the same plane

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segment

a part of a line with two endpoints

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adjacent angles

Two angles with a common side, a common vertex, and no common points within the angles

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supplementary angles

Two angles that add to 180º are called

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complementary angles

if the sum of two angles is 90%

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degree

unit based to measure angles ( symbol )

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ray

Part of a line that has one endpoint and extends indefinitely in one direction.

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perpendicular bisector

A line that is perpendicular to a segment at its midpoint.

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corresponding angles

two angles in corresponding positions relative to two lines cut by a transversal

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alternate exterior angles

Two nonadjacent exterior angles on opposite of the transversal.

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same side-interior angles

interior angles on the same side of a transversal

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exterior lines

The angle on the outside of a transversal.

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skew lines

noncoplanar lines that do not intersect

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parallel planes

planes that don't intersect

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parallel lines

parallel lined

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transversal

is a line that intersects each of two other coplanar lines in different points

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interior angles

the angle inside of a transversal

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alternate interior angles

two nonadjacent interior angles on opposite of the transversal

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