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What is "Three-four-five triangle" - Definition & Explanation

A method of layout to determine a right angle (square corner) in frames, fabric, construction, etc. It derives from the fact that a triangle with sides of 3-4-5 will have a right angle. The legs will be 3 and 4 and the hypotenuse will be 5. You can also use any multiple or units of measure, such as 3' 4' 5' or 60cm - 80 cm - 100 cm. An alternate way to layout or check for a rectangle is first to ensure opposite sides are the same length and then diagonal measures are the same. When the

Some other terms

Some more terms:

Small, slender piece of steel with a hole for thread and a point for stitching fabric. Machine embroidery needles come in sharp-points for piercing heavy, tightly woven fabric; ball-points, which...
Refers to any type of wind-resistant jacket worn when skiing. The conventional type zips in front and may be made of nylon, wool, fur or quilted fabric. Frequently it has an attached hood. Usually...
High-visibility clothing is any clothing worn that has highly reflective properties or a color that is easily discernable from any background. Orange hunting vests are a popular example of...
Oilskin referred originally to a type of fabric - canvas with, literally, a skin of oil applied to it as waterproofing. These days, oilskins or oilies means the foul-weather gear worn by sailors,...
Hakama are a type of traditional Japanese clothing. Hakama cover the lower body and resemble a wide, pleated skirt. Hakama were originally worn only by men, but today they are worn (albeit slightly...

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