Introduction To Geometry Vocab Flashcards
Point
Names a location and is 0 dimensional
Named with a dot with a capital letter
Line
Represented by a straight path that extends in two opposite directions and has no thickness . A line contains infinity many points and is 1 dimensional
Named by two points on the line and the line symbol, or by a lowercase script letter
Plane
Represented by a flat surface that extends without end and has no thickness . A plane contains infinity many lines. And is 2 dimensional ( length and width )
Named by at least 3 points that are non- collinear ( not on the line ),but on the plane , or by a script capital letter
What are the three basic figures in geometry that are considered to be undefined terms ?
Point , line , and plane
Points that lie on the came line are said to be _____ . Points that do not lie on the same line are _____
Collinear , non-collinear
Points and/ or lines that lie on the same plane are said to be _____. Points and / or lines that do not lie in the same on plane are ____.
Coplanar , non- coplanar
Segment
Is part of a line that consists of two endpoints and all points between them
Named by it’s two end points and segment symbol
Ray
Is part of a line that consists of one endpoint and all the points of the line on one side of the endpoint
Named by it’s endpoint and another point with ray symbol ( endpoint first )
Opposite rays
Are two rays that share the same endpoint and forma a line
Named by shared endpoint and any other point on each ay
___ is a statement that is accepted as true without proof. Points, lines , and planes help describe geometric properties . Also known as axiom .
Postulate
Through any two points, there’s exactly 1 ___
Line
If two distinct lines Intercet, then they Intercet at exactly 1___
Point
Through any 3 non-collinear points, there is exactly 1 ___
Plane
A ___ contains infinitely many lines
A ___ contain infinity many points
Plane / line
