ther, are longer then the other side that
remaineth.

If you do remember the first and seconde conclusions, then is
there no difficultie in this, for it is in maner the same
woorke. First consider the .iij. lines that you must take, and
set one of them for the ground line, then worke with the other
.ij. lines as you did in the first and second conclusions.

_Example._

[Illustration]

I haue .iij. A.B. and C.D. and E.F. of whiche I put .C.D. for my
ground line, then with my compas I take the length of .A.B. and
set the one foote of my compas in C, and draw an arch line with
the other foote. Likewaies I take the length of E.F, and set one
foote in D, and with the other foote I make an arch line crosse
the other arche, and the pricke of their metyng (whiche is G.)
shall be the thirde corner of the triangle, for in all suche
kyndes of woorkynge to make a tryangle, if you haue one line
drawen, there remayneth nothyng els but to fynde where the
pitche of the thirde corner shall bee, for two of them must
needes be at the two eandes of the lyne that is drawen.

THE XIII. CONCLVSION.

If you haue a line appointed, and a pointe in it limited,
howe you maye make on it a righte lined angle, equall to an
other right lined angle, all ready assigned.

Fyrste draw a line against the corner assigned, and so is it a
triangle, then take heede to the line and the pointe in it
assigned, and consider if that line from the pricke to this end
bee as long as any of the sides that make the triangle assigned,
and if it bee longe enoughe, then prick out there the length of
one of the lines, and then woorke with the other two lines,
accordinge to the laste conlusion, makynge a triangle of thre
like lynes to that assigned triangle. If it bee not longe
inoughe, thenn lengthen it fyrste, and afterwarde doo as I haue
sayde beefore.

[Illustration]

_Example._

Lette the angle appoynted bee A.B.C, and the corner assigned, B.
Farthermore let the lymited line bee D.G, and the pricke
assigned D.

Fyrste therefore by drawinge the line A.C, I make the triangle
A.B.C.

[Illustration]

Then consideringe that D.G, is longer thanne A.B, you shall cut
out a line from D. toward G, equal to A.B, as for example D.F.
Then measure oute the other ij. lines and worke with them
according as the conclusion with the fyrste also and the second
teacheth yow, and then haue you done.

THE XIIII. CONCLVSION.

To make a square quadr