Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Geometry Ch1Vocab
High School Math
| Question | Answer |
|---|---|
| point | a basic undefined term of geometry; simply a location; used to name lines and planes; they are recognized as a dot and are named by capital letters |
| line | made up of points and has no thickness or width; it is represented with arrowheads at each end; it is usually named by lowercase script letters or by writing capital letters for two points on the line with a double arrow over the pair of letters |
| collinear | points on the same line |
| plane | a flat surface made up of points;it has no depth and extends indefinitely in all directions; it is named by a capital script letter or by three noncollinear points; it is represented by a shaded, slanted 4-sided figure |
| coplanar | points that lie in the same plane |
| undefined terms | words, usually readily understood, that are not formally explained by means of more basic words and concepts. the basic terms of geometry are point, line, and plane |
| space | a boundless, three-dimensional set of all points; contains lines and planes |
| locus | another way to describe a group of points; a set of points that satisfy a particular condition |
| line segment | a measurable part of a line that consists of two points, called endpoints, and all of the points between them |
| precision | the accuracy of any measurement depends on the smallest unit available on the measuring tool |
| betweenness of points | the measure between points; for any two real numbers "a" and "b", there is a real number "n" between "a" and "b" such that a<n<b |
| between | for any two points A and B on a line, there is another point C between A and B if and only if A, B, and C are collinear and AC + CB = AB |
| congruent | having the same measure |
| construction | a method of creating geometric figures without the benefit of measuring tools; generally, only a pencil, straightedge, and compass are used |
| relative error | the ratio of the half-unit difference in precision to the entire measure, expressed as a percent |
| midpoint | the point halfway between the endpoints of a segment |
| segment bisector | a segment, line, or plane that intersects a segment at its midpoint |
| degree | a unit of measure used in measuring angles and arcs; an arc of a circle with a measure of 1 degrees is 1/360 of the entire circle |
| ray | part of a line; it has one endpoint and extends indefinitely in one direction; named by stating the endpoint first and then any other point |
| opposite rays | also known as a straight angle; its measure is 180 degrees; a point on the line where you can name two rays in opposite direction of each other |
| angle | formed by two noncollinear rays that have a common endpoint |
| interior | a point is in the inside of an angle if it does not lie on the angle itself and it lies on a segment with endpoints that are on the sides of the angle |
| exterior | a point is on the outside of the angle if it is neither on the angle nor in the interior of the angle |
| right angle | an angle with a degree measure of 90 |
| acute angle | an angle with a degree measure less than 90 |
| obtuse angle | an angle with degree measure greater than 90 and less than 180 |
| angle bisector | a ray that divides an angle into two congruent angles |
| sides | the two rays of an angle |
| vertex | the common endpoint of an angle |
| adjacent angles | two angles that lie in the same plane, have a common vertex and a common side, but no common interior points |
| vertical angles | two nonadjacent angles formed by two intersecting lines |
| linear pair | a pair of adjacent angles whose noncommon sides are opposite rays |
| complementary angles | |
| supplementary angles | |
| perpendicular | |
| polygon | |
| concave | |
| convex | |
| n-gon | |
| regular polygon | |
| perimeter |
Created by:
rierei1971
Popular Math sets