Question | Answer |
acute angle | an angle whose measure is between 0 and 90 |
angle | formed by two rays with the same endpoints |
angle bisector | a ray that divides an angle into two congruent angles |
collinear points | points on the same line |
congruent angles | angles that have the same measure |
congruent segments | segments that have the same lengths |
conjecture | conclusion reached by using inductive reasoning |
coordinate | a point by any order |
coplanar | figure in the same plane |
counterexample | a particular example or instance of the statement that makes it false |
inductive reasoning | type of reasoning that reaches conclusions based on patterns of specific examples or past events |
line | a series of points that extend in two directions without end |
midpoint | a point that divides a segment into two congruent segments |
obtuse angle | angle whose mearsure is between 90 and 80 |
opposite rays | collinear rays with the same endpoint |
parallel lines | two lines are parallel if they lie in the same plane and do not intersect |
perpendicular lines | lines that intersect and form right angles |
plane | flat surface with no thickness |
point | a location |
postulate | accepted statement of fact |
ray | part of line consisting of one endpoint and all the points of the line on one side of the endpoint |
right angle | an angle whose measure is 90 |
segment | part of a line consisting of two points and all points between them |
skew lines | noncoplanar line therefore, they are not parallel and do not intersect. |
space | set of all points |