Advanced Geo unit 1 vocab Flashcards
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What is a point?
In geometry, a point is a location in space that has no size, shape, width, length, or depth, and only has position.
What is a line?
In geometry, a line is a one-dimensional figure that has length but no width, and extends infinitely in both directions.
What is a plane?
In geometry, a plane is a flat, two-dimensional surface that extends infinitely in all directions and has no thickness or curvature.
What does coplanar mean?
In geometry, coplanar means “lying on the same plane”. The word “co” means “together” and “planar” means “lying on a plane”. Three point always determine a plane.
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Through any two points, there exists exactly one line.
What does collinear mean?
In geometry, collinear means a set of points that lie on a single straight line.
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- If two lines intersect, then their intersection is a point.
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- Through any three noncollinear points, there exists exactly one plane.
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- If two points lie on a plane, then the line containing them lies on the plane.
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- If two planes intersect, then their intersection is a line.
What are opposite rays
In geometry, two rays are opposite rays if they share the same endpoint and extend in opposite directions, forming a line when combined.
What is a Ray?
n geometry, a ray is a one-dimensional, straight line that extends infinitely from a single endpoint, also called the point of origin.
What are skew lines?
in three-dimensional geometry, skew lines are two lines that are not parallel and do not intersect, and are also non-coplanar.
What are parallel lines
In geometry, parallel lines are two or more lines that are always the same distance apart and never intersect, even if they are extended infinitely in both directions.
what does congruent mean?
In geometry, two figures are congruent if they have the same shape and size, and can be placed on top of each other exactly.
