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acute angles an angle that is less than 90 degress
congruent angles angles that have the same measurement
coplanar points and line in the same plane
midpoint the middle of a line
perpendicular lines intersect to form right angles.
ray is a part of a line that consist of an intial point and all points on the line that lie on one side of the intial point
space is the boundless three dimensional set of all points.
angle two rays that are connected at their endpoints.
congruent segments two segments with the same length.
counterexample an example or fact that is inconsistent with a hypothesis and may be used in argument against it
obtuse angle angle thats more than 90 degrees
plane a plat surface that has no thickness. it extends in all directions
right angle an angle that is exactly 90 degrees
angle bisector ray that divides an angle into two congruent angles
conjecture is a conclusion reached by using inductive reasoning
inductive reasoning a type of reasoning that reaches conclusions based on a pattern of specific examples or past events.
opposite rays are collinear rays with the same endpoint. they form a line
point has no length, width, or thickness, but has a position. LOCATION
segment the part of a line consisting pf two points, called endpoints, and all points between them
collinear points points that lie on the same line.
coordinate Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.
line has length, but no width or thickness. it extends without end in two directions
parallel lines are coplanar lines that do not intersect
postulate a statement accepted to be true without proof
skew lines are noncoplanor lines, not parallel, not intersect
Created by: katielynn