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NSA Geometry Ch1
NSA Geometry Chapter 1
| Question | Answer |
|---|---|
| point, line, plane | undefined terms |
| collinear | points on the same line are said to be this |
| coplanar | points that lie on the same plane are said to be this |
| line segment | portion of a line with two endpoints |
| congruent segments | segments with the same measure |
| midpoint | point that divides a segment into two congruent segments |
| segment bisector | any segment, line, or plane that intersects a segment at its midpoint |
| degree | unit of measure for an angle |
| ray | part of a line with one endpoint extending indefinitely in one direction |
| opposite rays | two rays that have a common endpoint and form a line |
| angle | formed by two non-collinear rays that have a common endpoint |
| vertex | common endpoint shared by two rays that form an angle |
| right angle | measures 90 degrees |
| acute angle | measures less than 90 degrees |
| obtuse angle | measures between 90 and 180 degrees |
| congruent angles | angles with the same measure |
| angle bisector | ray that divides an angle into two equal angles |
| adjacent angles | two angles in the same plane that share a common vertex and a common side, but no common interior points |
| vertical angles | two nonadjacent angles formed by intersecting lines |
| linear pair | adjacent angles whose non-common sides are opposite rays |
| complementary angles | two angles whose measures have a sum of 90 degrees |
| supplementary angles | two angles whose measures have a sum of 180 degrees |
| perpendicular | lines that form right angles are said to be this |
| point | names a location in space and has no size |
| perimeter | sum of the lengths of the sides of a figure |
| line | a straight path that has no thickness and extends forever |
| plane | a flat surface that has no thickness and extends forever |
| endpoint | a point at one end of a segment or ray |
| diameter | segment that passes through the center of a circle and whose endpoints are on the circle |
| radius | segment whose endpoints are the center of the circle and any point on the circle |
| circumference | distance around a circle |
| pi | irrational number which is the ratio of the circumference and diameter of a circle |