Kb(30s, a cube), in geometry, a solid bounded by six equal squares, so placed that the angle between any pair of adjacent faces is a right angle.
Then, if we take ordinates Kb, Lg, Mc, Nd, Pf, equal to B'B, GG', C'C, D'D, FF', the figure abgcdfe will be the equivalent trapezoid, and any ordinate drawn from the base to the a LM N P e X top of this trapezoid will be equal to the portion of this ordinate (produced) which falls within the original figure.
From El Kb southward its place was taken by Libyan sandstone, soft and easily worked, but unsuitable for fine sculpture.
To find the angular acceleration A, draw kI, bt respectively parallel to and at right angles to the link KB.
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