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Geometry test #1
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Gravity
Terms in this set (37)
Triangle
Three line segments hat meet at three verticies
congruent angles
angles that have the same measure
acute angle
an angle that measures less than 90 degrees
A right angle
An angle that is exactly 90 degrees
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
straight angle
an angle that measures 180 degrees
vertical angles
Sides form opposite rays
linear pair
A pair of adjacent angles whose noncommon sides are opposite rays.
supplementary angles
Two angles whose sum is 180 degrees
complementary angles
Two angles whose sum is 90 degrees
Midpoint formula
(x₁+x₂)/2, (y₁+y₂)/2
Distance formula
d = √[( x₂ - x₁)² + (y₂ - y₁)²]
defined terms
Word that has been defined
undefined terms
Described but not defined
Theorems
propositions that are logically true based on the assumptions in a model
Axioms
self evident truths
Line
Extends in opposite direction without end
Plane
A two-dimensional flat surface that extends in all directions
Ray
A part of a line, with one endpoint, that continues without end in one direction
Segment
part of a line that consists of two endpoints and all points between them
Coplanar
points that lie on the same plane
Collinear
Points that lie on the same line
Geometric figure
Non empty subset of space
opposite rays
two rays that have a common endpoint and form a line
Point
an exact location in space
Space
the set of all points
congruent segments
segments that have the same length
coordinate
Real number that corresponds to a point
Midpoint
A point that divides a segment into two congruent segments
Equal
Having the same value.
segment bisector
Line ray or plane that intersects a segment at its midpoint
Bisect
Divide into 2 equal parts
An angel
Two different rays with an endpoint
Sides
the rays of an angle
Vertex
The common endpoint of the rays of an angle
adjacent angles
Angles that have the same vertex, share a common side, and do not overlap.
Linear pair
A pair of adjacent angles whose noncommon sides are opposite rays.
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