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Definition
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Definition
| Part of a line, with two end-POINTS. |
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| Part of a line. One end-POINT. |
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| Measures between 0 degrees and 90 degrees. (smaller than 90 degrees) |
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| Measures between 90 degrees and 180 degrees. (bigger than 90 degrees). |
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| Measures exactly 90 degrees. |
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| Measures exactly 180 degrees. (flat angle). |
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Definition
| Two angles whose measures have a sum (+) of 90 degrees. |
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Definition
| Two angles whose measures have a sum (+) of 180 degrees. |
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Definition
| Intersecting lines form two pairs fo vertical angles. |
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Definition
| have the same size and shape. |
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Definition
| Lines that never meet (clue: railroad tra cks). |
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| Lines that form right angles (clue: two streets that form a 4 way stop). |
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Definition
| A line that intersects two or more lines. |
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| A triangle with 3 acute angles. |
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Definition
| A triangle with 1 right angle. |
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Definition
| A triangle with 1 obtuse angle. |
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Definition
| The sum (+) of the measures of the three interior (inside) angles of any triangle is 180 degrees. |
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Definition
| Polygons with 4 sides and 4 angles. |
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Definition
| Polygons with 2 pairs of parallel sides. |
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Definition
| Polygons with exactly 1 pair of parallel sides. |
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Definition
| Polygons with 4 right angles. |
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Definition
| Polygons with 4 congruent sides. |
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Term
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Definition
| Polygons with 4 right angles. |
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Term
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Definition
| A MIRROR IMAGE (flip) of a figure. |
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| A figure SLIDES in one direction. |
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Definition
| A line that is drawn through a figure vertically (up and down) that cuts the figure in two mirror images. |
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Definition
| A horizontal line (left to right) is drawn through a figure that cuts the figure into two mirror images. |
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Term
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Definition
| A diagonal line (corner to corner) is drawn through a figure that cuts the figure into two mirror images. |
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Term
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Definition
| Turning an object so that it looks exactly the same. The number of positions in which it looks exactly the same is its order of symmetry. |
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