AY Honors/Dressmaking/Answer Key

2007-07-28T23:40:50Z

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:'' For other uses, see the disambiguation page [[Zig zag]]''

A '''zigzag''' is a [[pattern]] made up of many small corners at an [[angle|acute angle]], tracing a path between two [[parallel lines]]; it can be described as both jagged and fairly regular.

From the point of view of [[symmetry]], a regular zigzag can be generated from a simple motif like a [[line segment]] by repeated application of a [[glide reflection]]:

:-+-+-+-+-+-+-+-+-+

Equally it is the [[juxtaposition]] of [[chevron (insignia)|chevron]]s, or of [[forward slash]]es and [[backslash]]es like this:

:<tt>/\/\/\/\/\/\/\/\/\</tt>

or even:

:.-'-.-'-.-'-.-'-.-'-.-'-.-'-.-'-

[[Lightning]] is often [[drawing|draw]]n as a zigzag, with long downward strokes and short backward ones. [[Store]]s of the defunct U.S. [[retail chain]] [[The Treasury]] (also [[Treasure Island (retailer)|Treasure Island]]) each had a distinct zigzag [[roof]], many of which still survive on reused buildings nearly three decades after the chain closed. The roof zigzag was also seen on the store [[logo]].

An [[automobile]] could move in a zigzag, that is, not going straight, but instead turning left and right and left repeatedly. In a [[city]] where [[street]]s are oriented toward the four [[cardinal direction]]s, this would be illustrated by, for example, driving north, west, north, west, north, west, and so on around the [[city block]]s, in order to go northwest. (This would not make the trip any shorter, however it might avoid [[traffic]].)

The [[trace]] of a [[triangle wave]] or a [[sawtooth wave]] is a zigzag. [[Pinking shears]] are designed to cut [[cloth]] or [[paper]] with a zigzag edge, to lessen [[fraying]]. Zigzags are a basic decorative pattern used on [[pottery]], and often for the cuts which separate [[ravioli]].

In [[sewing]], a '''zigzag stitch''' is a [[sewing machine|machine]] stitch in a zigzag pattern. Tightly space zigzag stitches are used to emulate [[embroidery stitch]]es such as satin stitch, and to reinforce [[buttonhole]]s.
Zigzag stitch is also used as a non-structural seam, to temporarily hold two panels together edge-to-edge (and eliminate the ridge that would "x-ray" through). This is done when another panel will overlay the seam and provide support.

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[[Category:Patterns]]
[[Category:Sewing stitches]]

[[de:Zick-Zack]]
[[eo:Zigzago]]
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[[nl:Zigzag (lijn)]]

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AY Honors/Dressmaking/Answer Key