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| A plane that is divided into four regions by a horizontal and a vertical number line. |
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| One of the intersecting number lines that divide the coordinate plane into quadrants. |
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| The horizontal number line that divides the coordinate plane. |
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| The vertical number line that divides the coordinate plane. |
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| One of the four regions of the coordinate plane formed by the x- and y-axes. |
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| The “address” of a point. Usually written as an ordered pair. |
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| A pair of x and y values that represents a position on the coordinate plane. The x value is always listed first. Examples: (–5, 6), (113, –257), (x, y). |
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| The point where the x- and y-axes cross. Its coordinates are (0, 0). |
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Definition
| A flat figure with three sides. |
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| A flat figure with four sides. |
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| A quadrilateral with one set of parallel sides. |
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| A quadrilateral with two sets of parallel sides. |
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Definition
| A quadrilateral with four right angles. |
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| A quadrilateral with four right angles and four congruent (same-length) sides. |
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| A triangle with one right (90ยบ) angle. |
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Definition
| The point that forms the corner of a triangle, quadrilateral or other shape. |
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