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vocabulary project

acute angle an angle smaller then 90 degrees
congruent angles equal in measure
coplanar points and lines in the same plane
midpoint a point that divides a segment into two congruent segments. it bisects a segemnt.
perpendicular lines intersect to form right angles
ray a part of a line that consists of a initial point and all points on the line that lie on one side of the initial point.
space is the boundless 3-dimensional set of all points
angle two rays connected at their end points
congruent segments two segments with the same length
counterexample a single counter is enough to disprove a conjecture
obtuse angle an angle larger then 90 degrees
plane is a flat surface that has no thickness. it extends without end in all directions. you need at least 3 noncollinear points to name a plane.
right angle an angle that measures exactly 90 degrees
angle bisector cuts an angle into two congruent angles
conjecture a conclusion reached through inductive reasoning
inductive reasoning based on observed patterns
opposite rays start at the same point and go in opposite directions
point has no length, width, or thickness, but has a position
segment a portion of a line between two points, called end points
collinear points points that lie on the same line
coordinate the distance and directions from the origin of a number line.
line has no length, no width, or thickness. it extends without end in two directions.
parallel lines coplanar lines that do not intersect
postulate a statement to be true without proof
skew lines noncoplanar lines that are not parallel and do not intersect
Created by: lizzy1193