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The diagonals of a parallelogram

Calculator computes the diagonals of a parallelogram and adjancent angles from side lengths and angle.

PLANETCALC, The polygon diagonals of a parallelogram

The polygon diagonals of a parallelogram

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Digits after the decimal point: 2

Tidal gate calculator (Rule of twelfths)

This calculator calculates tidal gates using the rule of twelfths, estimating the height of the tide at any time, given only the time and height of high and low water.

PLANETCALC, Tidal gate calculator (Rule of twelfths)

Tidal gate calculator (Rule of twelfths)

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Digits after the decimal point: 1