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| Start / | Knowledge / | Shapes and Sizes / |
| Rounds | Ellipses | Triangles | Quadrangles | Pentagons | Polygons | Animals | Fruits | Humans | Maps | Other Shapes | Free-Form Shapes |
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Knowledge / Shapes and Sizes / Postage Stamp Shapes / Quadrangles |
Quadrangular Postage Stamp: stamp in geometric order with three edges |
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Rectangular Postage Stamp: stamp shaped like a horizontal or vertical rectangle with equilateral opposite sides |
quadrangular postage stamp convex at top |
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quadrangular postage stamp convex at top and at bottom |
quadrangular postage stamp concave at top and at bottom |
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Pulvinated Postage Stamp: quadrangular stamp with four concave sides |
vertical quadrangular postage stamp pointing up |
quadrangular postage stamp with triangular tops |
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Square Postage Stamp: stamp shaped like a horizontal or vertical quadrangle with 4 equilateral sides |
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Fan Shaped Postage Stamp: stamp shaped like a horizontal or vertical fan |
Arched Postage Stamp: quadrangular stamp shaped like an arch |
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Parallelogram Postage Stamp: quadrangular oblique shaped stamp sloping right or left with equilateral opposite sides |
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Rhomb Postage Stamp: horizontal or vertical quadrangular oblique shaped stamp with 4 equilateral sides |
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Trapeze Postage Stamp: horizontal or vertical quadrangular shaped stamp with 2 equilateral and 2 parallel scalene sides |
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Waved Postage Stamp: stamp shaped like a horizontal or vertical quadrangle with arched sides |
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