parallelogram rule

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parallelogram rule

n
1. (General Physics) maths physics a rule for finding the resultant of two vectors by constructing a parallelogram with two adjacent sides representing the magnitudes and directions of the vectors, the diagonal through the point of intersection of the vectors representing their resultant
2. (Mathematics) maths physics a rule for finding the resultant of two vectors by constructing a parallelogram with two adjacent sides representing the magnitudes and directions of the vectors, the diagonal through the point of intersection of the vectors representing their resultant
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References in periodicals archive ?
Geometrically this addition corresponds to a parallelogram law: in Figure 4, the sum 4 + 5i is represented by the vertex R of the parallelogram POQR.
However, the modulus of a complex number is a real number, and the parallelogram law for addition suggests we might have more luck here.