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Geometry - Chapter 1
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Gravity
Key Concepts:
Terms in this set (18)
ray
part of a line that starts at an endpoint and goes on without end in one direction
line segment
part of a line with 2 endpoints
line
A line is made up of points and has not width or thickness. A line has not beginning or ending.
point
A point is a location.
It has neither shape or size. We use a dot to represent a point.
Points can be by themselves, or they can be part of a line or shape.
intersecting lines
lines that meet or cross at a common point
parallel lines
lines that lie in the same plane and do not intersect or cross
perpendicular lines
two lines or line segments that intersect or meet to form right angles
right triangle
A triangle is classified as a right triangle if it has one angle measure of 90 degrees.
right angle
an angle that measures exactly 90 degrees
Plane
A flat surface that has no thickness and extends forever. A plane is defined by 3 non-collinear points.
Collinear Points
Points that lie on the same line.
Non-Collinear Points
points that do not lie on the same line
Coplanar Points
Points that lie one the same plane.
Non-coplanar points
points that do not lie on the same plane
Intersection of 2 lines
is 1 point
Intersection of 2 planes
is a line.
Chapter 1
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Geometry 0 c
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