Основная величина. нужная для расчетов, половина длины дуги

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ОСНОВНАЯ ВЕЛИЧИНА. НУЖНАЯ ДЛЯ РАСЧЕТОВ, ПОЛОВИНА ДЛИНЫ ДУГИ

На чертеже мы обозначили ее буквой «Д» и для примера взяли длину дуги, равную 26 см, значит, основная величина 26:2 = 13 см (Д = 13). А вы при построении подставьте свой размер. Все остальные цифры, стоящие на чертеже, не меняются — это величины постоянные.

Итак, строим выкройку.

1.   Чертим вертикальную и горизонтальную линии (см. чертеж). От точки их пересечения вверх и вниз откладываем отрезок, равный Д (13).

2.   Через нижнюю точку проводим горизонтальную линию.

3.   В центре чертим окружность с радиусом 5 см.

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StepheJet, 8 января 2016 16:30

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