Basic Figures
has zero dimension
What is a point
Two adjacent, supplementary angles
What is linear pair
same size, same shape
What is congruent
to cut into two congruent angles/segments
What is bisect
extends in two dimensions, has no edges
What is a plane
two angles that sum to 90 degrees
What is complementary
lines that never intersect
What is parallel lines
when angles share a ray and a vertex
What is a adjacent
two angles whose sum is 180 degrees
What is supplementary angles
two lines that intersect to form right angles
What is perpendicular
a statement we assume is true
What is a postulate
two angles whose measure is the same
What is congruent angles
based on patterns and observations
What is a conjecture
a statement that can be proven
What is a theorem
created by two rays that share an endpoint
What is an angle
created by two intersecting lines, always congruent
What is vertical angles
points/lines that lie on the same plane
What is a coplanar
one statement used to prove a conclusion is wrong
What is a counterexample