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| A polygon that has 3 sides and 3 angles. |
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| A 4-sided polygon that has exactly one pair of parallel sides. |
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| A point where the sides of an angle, the sides of a polygon, or any corner of a solid. |
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(1) One of the rays or segments that make up an angle.
(2) One of the line segments of a polygon.
(3) One of the faces of a solid figure. |
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| A polygon that has four angles. |
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| A parallelogram with all four sides the same length. |
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| A 4-sided polygon with two pairs of equal sides. The equal sides are next to each other. The four sides cannot all have the same length. |
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| A figure that is formed by two rays or two line segments that have the same endpoint. |
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| A parallelogram whose corners are all right angles. |
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| A rectangle whose sides are all the same length. |
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| Always the same distance apart, and never meeting or crossing each other, no matter how far extended. |
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| A triangle that has one 90 degree angle. |
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| A triangle with all three sides equal in length. |
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| A polygon whose sides all have the same length and whose angles (inside the polygon) all have the same size. |
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| A closed figure on a flat surface that is made up of line segments joined end to end. The line segments make one closed path and may not cross. |
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