| 11. | The elytra are elongate with parallel sides, and heavily striated.
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| 12. | The shells of species in this genus are long and narrow with parallel sides.
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| 13. | These are chips that have a length double than the width and parallel side edges.
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| 14. | The lengths of the parallel sides and the distance between them being the given numbers.
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| 15. | A large-tipped bar with nearly parallel sides bores easily and does not tend to jam.
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| 16. | Chisels were thicker, shorter and had parallel sides.
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| 17. | It is the distance between parallel sides of a regular hexagon with sides of length 1.
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| 18. | Let " ABCD " be a tangential quadrilateral with at most one pair of parallel sides.
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| 19. | The hindwings are also narrow with parallel sides.
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| 20. | Some modern variants are constructed as a parallel sided tube, with a draw-string closure at one end.
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