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Math 9.5 - 9.7 Vocab
Vocab for 9.5 - 9.7 Course 1
| Question | Answer |
|---|---|
| Point | Usually labeled with an uppercase letter, such as A or B |
| Line | Extends without end in two opposite directions |
| Ray | Has one endpoint and extends without end in one direction. |
| Segment | Has two endpoints |
| Plane | A flat surface that extends without end in all directions |
| Two different lines | Either intersect or are parallel |
| Intersecting Lines | Meet at a point |
| Parallel lines | Never meet |
| Angle | Formed by two rays with the same endpoint |
| Vertex | The angle; the point where two line segments meet. |
| Degrees | Measurement of angles |
| Right angle | An angle that measures 90 degrees |
| Acute angle | An angle that measures below 90 degrees |
| Obtuse angle | An angle that measures between 90 and 180 degrees |
| Straight angle | An angle that measures exactly 180 degrees; looks like a straight line |
| Vertical angles | Angles across from each other that have equal measures |
| Complementary angles | two angles that add up to 90 degrees |
| Supplementary angles | two angles that add up to 180 degrees |
| Triangle | A closed plane figure with three straight sides that connect three points |
| Acute triangle | has three acute angles |
| Right triangle | has one right angle |
| Obtuse triangle | has one obtuse angle |
| Equilateral triangle | has three sides the same length |
| Isosceles triangle | has at least two sides of the same length |
| Scalene triangle | has three sides of different lengths |
| Quadrilateral | A plane figure formed by 4 segments called sides |
| Parallelogram | A quadrilateral with 2 pairs of parallel sides |
| Rectangle | A parallelogram with 4 right angles |
| Rhombus | A parallelogram with 4 sides of equal length |
| Square | A parallelogram with 4 sides the same length and 4 right angles |
| Polygon | closed figure that is formed by three or more segments called sides |
| 3 sides | Triangle |
| 4 sides | Quadrilateral |
| 5 sides | Pentagon |
| 6 sides | Hexagon |
| 8 sides | Octagon |
| Regular Polygon | Polygon with equal side lengths and equal angle measures |
| Diagonal | Connects two opposite angles of the polygon |
| Congruent | Having the same shape and same size |
| Similar | Having the same shape, but not necessarily the same size |
| Corresponding parts | the matching sides and angles of two figures |
| Line symmetry | if a line can be drawn that divides the figure in two congruent parts that are mirror images of each other |
Created by:
lkdedinsky.clm
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