To draw a circle about a square quadrate.
Draw ij. lines betwene the iiij. corners of the quadrate, and
where they mete in crosse, ther is the centre of the circle that
you seeke for. Then set one foot of the compas in that centre,
and extend the other foote vnto one corner of the quadrate, and
so may you draw a circle which shall iustely inclose the
quadrate proposed.
_Example._
[Illustration]
A.B.C.D. is the square quadrate proposed, about which I must
make a circle. Therfore do I draw ij. lines crosse the square
quadrate from angle to angle, as you se A.C. & B.D. And where
they ij. do crosse (that is to say in E.) there set I the one
foote of the compas as in the centre, and the other foote I do
extend vnto one angle of the quadrate, as for example to A, and
so make a compas, whiche doth iustly inclose the quadrate,
according to the minde of the conclusion.