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unit 4
| Question | Answer |
|---|---|
| A part of a line with one endpoint and extends forever | ray |
| a figure formed from to lines or rays together. | angle |
| a straight path that goes on forever in both directions | line |
| lines, line segments, rays are perpendicular if they form right angles | perpendicular |
| the same distant apart at every point | parallel |
| lines that are not parallel or perpendicular | obligue |
| to cut or divide by passing through or across | intersect |
| a tool that measures angles | protractor |
| a unit for measuring angles | degree |
| a ninety degree angle | right angle |
| a 180 degree angle | straight angle |
| angles having a sum of 180 degrees | supplementary angles |
| angles having a sum of 90 degrees | complimentary angles |
| when 2 lines intersect they form these | opposite angle |
| pairs of opposite formed by intersecting lines are called these | vertical angle |
| a closed shape with no curved sides | polygon |
| the exact same shape and size | congruent |
| a triangle with 2 congruent sides | isosceles triangle |
| a triangle with the exact same sides | equilateral triangle |
| a triangle with all different sides | scalene triangle |
| a triangle with three acute angles | acute triangle |
| a triangle with one right angle | right triangle |
| a triangle with one obtuse angle | obtuse triangle |
| trapezoid with at least | right trapezoid |
| a plane figure that forms a closed path so that every spot is the same distance from the center | circle |
| reflex angle a angle greater than 180 degrees |
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