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Geometry Vocab
Chapter 1
| Question | Answer |
|---|---|
| two angles who share a common vertex and a side but have no common interior points | Adjacent Angles |
| a ray that divides an angle into two angles that are congruent | Angle Bisector |
| an angle that measures between 0 and 90 degrees | Acute Angle |
| an angle that measures between 90 and 180 degrees | Obtuse Angle |
| an angle that measures 90 degrees | Right Angle |
| an angle that measures 180 degrees | Straight Angle |
| points that lie on the same line | Collinear |
| tool used to draw angles | Compass |
| two angles whose sum of their measures equals 90 degrees | Complementary/Complement |
| no line that contains a side of the polygon contains a point in the interior of the polygon | Convex |
| points that lie on the same plane | Coplanar |
| all sides are congruent | Equilateral |
| not convex | Concave |
| all angles are congruent | Equiangular |
| Is equilateral and equiangular | Regular |
| part of a line with two endpoints and all the points in between | Line segment |
| part of a line with one endpoint and all the points on one side of the endpoint | ray |
| two collinear rays with the same endpoint that form a line | opposite rays |
| endpoints | |
| two adjacent angles that have their noncommon sides form a line | Linear Pair |
| the point that divides the segment into two congruent segments | Midpoint |
| statements we accept to be true | Postulate |
| tool used to measure the degree of angles | Protractor |
| a point, ray, line, line segment, or plane that intersects the segment at its midpoint | Segment Bisector |
| two angles whose sum of their measures is 180 degrees | Supplementary/Supplement |
| statements we prove to be true | Theorm |
| has no dimensions (size) | Point |
| series of points without end | Line |
| flat surface that extends in all directions in two dimensions without end | Plane |
| initial point | Vertex |
| two angles that sides form two pairs of opposite rays | Vertical Angles |
| Distance Formula | |
| Midpoint Formula | |
| Congruent vs. Equal | |
| if two segments have the same length | *congruent |
| two rays with a common endpoint | *angles |
| a closed figure that lies in a plane formed by three or more line segments | *polygon |
| the distance between A and B is the absolute value of the difference between the coordinates A and B | *ruler postulate |
| if B is between A and C then AB+BC=AC (sum of the parts is equal to the whole) | *segment addition postulate |
| if P is the interior of angle RST then measure of angle RSP plus the measure of angle PST will equal the measure of angle RST (sum of parts is equal to whole) | *angle addition postulate |
Created by:
12tsherman
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