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All angles between 0 and 45 degrees are automatically indicated.the length of the secant or the height of the tangent for length of base 1Example- V30 degree. tangent 0.577-basis 700mm-height 0.577 x 700 403.9 mm.secant 1.155-length 1.155 x 700 808.5 mmBeval edge thickness 2.5mm-250mm x 320mm