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Unit One Gina Wilson: Geometry Basics
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Gravity
Key Concepts:
Terms in this set (24)
point
location with no shape or size
line
made up of points and has no thickness or width
plane
flat surface made up of points that extends infinitely in all directions
Collinear
Points that lie on the same line
Coplanar
points that lie on the same plane
line segment
measurable part of a line consisting of two endpoints
Distance formula
used to fine the distance b/t 2 points on a coordinate plane
congruent segments
segments that have the same length
midpoint formula
used to find the midpoint b/t two endpoints
segment bisector
any segment, line, or plane that intersects a segment at its midpoint
ray
A line that extends indefinitely in one direction
angle
intersection of two rays at an endpoint
vertex
The common endpoint of an angle
right angle
an angle that measures 90 degrees
acute angle
an angle that measures less than 90 degrees
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
congruent angles
angles that have the same measure
adjacent angles
Angles that have a common side and a common vertex (corner point).
Verticals angles
two angles directly across from each other on intersecting lines
complementary angles
Two angles whose sum is 90 degrees
supplementary angles
Two angles whose sum is 180 degrees
linear pair
Two angles that are adjacent and supplementary
perpendicular
intersect at a 90 degree angle
angle bisector
a ray that divides an angle into two congruent angles
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