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Equilateral peracid

Construction:
1) draw to the fold of the fabric perpendicular. Which is delayed 1/2 of the mid-parecida value (1) - AA1, A1A2 = 7 - 10 cm (for processing)
2) From point A on the fold-delayed value of the formation of the first folds parecida (5) minus 8 cm 8 cm - 1/2 the depth of the first fold (bend)
AD = value (5) - 8 cm
3) Connect points D and A1, arc equal to 1/2 the length of the top of the SAG of peracid (6) obtained by the measurement. Connect points A2 and D. А2Д - 1/2 length of upper SAG of peracid with an allowance for processing.
4) From point A on the fold pushes the depth of peracid (3) with k (2) AB = (3) x k (2)
5) From point B along the fold lay off 1/2 the depth of peracid BV = 1/2 led. (3)
6) From point B hold perpendicular to the bend
7) From point To conduct an arc equal to the lower of the SAG (4) obtained by measurement of the perpendicular drawn from the point B
8) VG = total (4) + 5 cm (for processing)
9) Connecting the points A2 and d, the resulting value (2) - shoulder peracid with the k build to a depth of laying folds.

Equilateral peracid

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