When cutting patterns from fabric, why should you allow extra around the pattern?

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KS3 DT - Design and Technology Practice Test: Textiles — practice the complete quiz, review flashcards, or try a random question.

Textiles (fabrics) are made from natural fibres like cotton, wool, silk or linen are manufactured in three stages - spinning, weaving or knitting and finishing. Most synthetic fibres like nylon, polyester and viscose are normally continuous filament fibres and do not require the spinning part of the process. Natural fibres require spinning because they usually have short fibres. Spun fibres are called yarn. Yarn for weaving is twisted tightly to make it strong and so woven fabrics don't stretch much. Yarn for knitting is twisted more loosely to make it stretchy. Woven fabrics are made on a... Show more

When cutting patterns from fabric, why should you allow extra around the pattern?