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Geometry C 1
| Question | Answer |
|---|---|
| Point | A location in space that is represented by a dot and has no dimension |
| Line | One dimensional geometric figure that extends in two opposite directions without end |
| Plane | A flat surface made up of points that has two dimensions and extends without end and is resented by a shape that looks like a floor or wall |
| Endpoints | Points that represents the ends of a line segment or ray |
| Ray | A geometric figure that consists of the endpoint A and all points on line AB the lie on the same side of point A as point B |
| Intersection | Th e set of points two or more geometric figures have in common |
| postulate/axiom | A rule that is accepted without proof |
| midpoint | the point that divides a segment into two congruent segments |
| Segment bisector | A point, ray, line, line segment, or plane that intersects a segment at its midpoint |
| convex polygon | a polygon in which no line that contains a side of the polygon contains a point in the interior of the polygon |
| concave polygon | a polygon which at least one line that contains a side of the polygon contains a point in the interior of the polygon |
| ploygon | a close plane figure formed by three or more line segments |
| acute angle | an acute angle that has a measure greater than 0 and less than 90 |
| right angle | an angle that has a measure of 90 |
| obtuse angle | an angle that has a measure greater than 90 and less than 180 |
| straight angle | an angle that has a measure of 180 |
| angle bisector | a ray that divides an angle into two angles that are congruent |
| complementary angles | two angles whose measures has a sum of 90 |
| supplementary angles | two angles whose measure have a sum of 180 |
| adjacent angles | two angles that share a common vertex and side but have no common interior points |
| vertical angles | two angles whose sides from two pairs of opposite rays |
| undefined terms | words that do not have a formal definitions but there is agreement about what they mean. ( point, line, plane) |
| collinear points | points that lie on the same line |
| coplanar points | points that lie on the same plane |
| defined terms | terms that can be described using kn own words such as point or line |
| segment | consists of two endpoints and all the points between them |
| opposite rays | rays that start at the same point but go away from each other creating a straight line |
| coordinate | a real number that corresponds to a point on a line |
| distance | the absolute value of the difference of two coordin |
| construction | a geometric drawing that uses a limited set of tools, usually a compass and streightedge |
| congruent segments | line segments that have the same length |
| between | when three points are collinear, one point is between the other two |
| vertex of an angle | the common endpoint of two rays |
| angle | a set of points that consisting of two different rays that have the same endpoint |
| sides of an angle | the rays of an angle |
| interior of an angle | the region that contains call points between that sides of an angle |
| exterior of an angle | angles that form linear pairs with that interior angles of a polygon |
| measure of an angle | the absolute value of the difference between the real numbers matched with the two rays that form the angle on the protractor |
| linear pair | two adjacent angles whose non common sides are opposite rays |