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Unit 4
Question | Answer |
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Ray | A part of a line that has one endpoint and extends without end in one direction. |
Angle | A figure formed by two rays or line segments with a common endpoint. |
Line | A straight path that goes on forever in opposite directions. |
Perpendicular | Lines,line segments,or rays are perpendicular if they form right angles. |
Parallel | The same distance apart at every point. |
Oblique | Lines that are not parallel or perpendicular |
Intersect | To cut or divide by passing through or across |
Protractor | a tool used to measure angles |
Degree | A unit for measuring angles. |
Right angle | An angle that measures 90 degrees |
Straight angle | An angle of 180 degrees |
Supplementary angles | Angles having a sum of 180 degrees |
Complementary angles | Angles having a sum of 90 degrees |
Opposite angle | When two lines intersect |
vertical angles | pairs of opposite angles formed by intersecting lines |
circle | a plane figure that forms a closed path so that all the points on the path are the same distance from a point called the center |
straight angle | an angle of 180 |
reflex angle | an angle that is greater than 180 degrees |