Squaring of the Circle (1503) - Page 20

Conclusion

...[movab]le The text continues from the previous page's "m...", likely "mobilem," referring to the movable foot of the compass. and from the center center centrum of the same extended to the circumference circumference circunferentia, just as it appears in the author's diagram above. And note that the circles, as the author also says, are for this reason not actually completed in practice but are understood as being complete; for if they were completed in practice, they would obscure the clear visibility and appearance of the square square quadratum positioned beneath them.

For greater clarity and an abundance of instruction, these things may also be added to what has been said: once three circles have been drawn as demonstrated in the diagram above—in which four straight lines straight lines lineae rectae constituted a square (that is, a figure which has four equal sides and four equal angles, meaning right angles right angles anguli recti)—let the stationary foot of the compass compass circinus be placed at the end original: "capite," literally "head." of the aforementioned line proceeding from the center of the third circle. Let the other movable foot of the compass be placed in the center of the second circle, from which it should be rotated as far as the center of the third circle, forming a fourth circle original: "orbem," often used interchangeably with "circulus" in this context. c-K-a, which should intersect the second and third circles each in its proper place, and be intersected by them in this manner, namely:

[A geometrical diagram consisting of three overlapping circles arranged horizontally, with a fourth circle potentially implied or partially intersecting. Overlaid on the central area of the circles is a square labeled with the letters A, B, C, and D at its corners. Various other letters (G, Z, K, H, F) and numbers (3, 4) with superscripts are placed within and around the circles to indicate specific points, centers, or geometric relationships. A central vertical line is labeled with 'A' and 'P + B'. To the right, the text '9th Circle' original: "P^9 CIRC^9" is visible.]