Euclid:Proposition/VI/28

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Proposition

In the words of Euclid:

To a given straight line to apply a parallelogram equal to a given rectilineal figure and deficient by a parallelogrammic figure similar to a given one: thus the given rectilineal figure must not be greater than the parallelogram described on the half of the straight line and similar to the defect.

(The Elements: Book $\text{VI}$: Proposition $28$)


Sources