To make a square quadrate aboute annye circle assigned.
Drawe two diameters in crosse waies, so that they make foure
righte angles in the centre. Then with your compasse take the
length of the halfe diameter, and set one foote of the compas in
eche end of the compas, so shall you haue viij. archelines. Then
yf you marke the prickes wherin those arch lines do crosse, and
draw betwene those iiij. prickes iiij right lines, then haue you
made the square quadrate accordinge to the request of the
conclusion.
_Example._
[Illustration]
A.B.C. is the circle assigned in which first I draw two
diameters, in crosse waies, making iiij. righte angles, and
those ij. diameters are A.C. and B.D. Then sette I my compasse
(whiche is opened according to the semidiameter of the said
circle) fixing one foote in the end of euery semidiameter, and
drawe with the other foote twoo arche lines, one on euery side.
As firste, when I sette the one foote in A, then with the other
foote I doo make twoo arche lines, one in E, and an other in F.
Then sette I the one foote of the compasse in B, and drawe twoo
arche lines F. and G. Like wise setting the compasse foote in C,
I drawe twoo other arche lines, G. and H, and on D. I make twoo
other, H. and E. Then frome the crossinges of those eighte arche
lines I drawe iiij. straighte lynes, that is to saye, E.F, and
F.G, also G.H, and H.E, whiche iiij. straighte lynes do make the
square quadrate that I should draw about the circle assigned.