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Geometry for Elementary and Middle School
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Gravity
Terms in this set (25)
Point
Simply a location (neither has shape nor size)
Line
Made up of points (no thickness or width)
Plane
Flat surface made up of points (no depth and extends infinitely in all directions)
Space
Boundless, three dimensional set of all points
Intersecting Lines
These types of lines have one point in common
Concurrent Lines
These lines occur when three or more lines intersect at a common point
Parallel Lines
These lines do not intersect and lie in the same plane
Skewed Lines
These lines do not intersect and lie in different planes
Half Line
Contains all points on one side of a given point ( open circle )
Ray
The union of a point and a half line( includes one endpoint and continues infinetly in one direction)
Line Segment
Contains two endpoints
Interior point
The inner most point
Angle
A union of two rays that have a common endpoint (vertex)
Right Angle
An angle at 90 degrees
Obtuse Angle
An angle that is greater than 90 degrees
Acute Angle
An angle that is less than 90 degrees
Straight Angle
An angle that is 180 degrees
Reflex Angle
An angle that is greater than 180 but less than 360
Adjacent Angles
Share a vertex and a side that does not intersect
Vertical Angles
Non-Adjacent angles that are formed by two intersecting lines
Congruent Angles
Angles the same measure of degrees
Linear Angles
Adjacent angles that form a straight line
Complimentary Angles
two angles whose sum equals 90 degrees
Supplementary Angles
Two angles whose sum equals 180
Transversal
A line that intersects two or more lines in a plane
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