doo like wise with the same
compasse vnaltered, at the other end of the line, and wher these
ij. croked lynes doth crosse, frome thence drawe a lyne to ech
end of your first line, and there shall appear a threlike
triangle drawen on that line.

[Illustration]

_Example._

A.B. is the first line, on which I wold make the threlike
triangle, therfore I open the compasse as wyde as that line is
long, and draw two arch lines that mete in C, then from C,
I draw ij other lines one to A, another to B, and than I haue my
purpose.

THE .II. CONCLVSION

If you wil make a twileke or a nouelike triangle on ani
certaine line.

[Illustration]

Consider fyrst the length that yow will haue the other sides to
containe, and to that length open your compasse, and then worke
as you did in the threleke triangle, remembryng this, that in a
nouelike triangle you must take ij. lengthes besyde the fyrste
lyne, and draw an arche lyne with one of them at the one ende,
and with the other at the other end, the example is as in the
other before.

[Illustration]

THE III. CONCL.

To diuide an angle of right lines into ij. equal partes.

First open your compasse as largely as you can, so that it do
not excede the length of the shortest line y^t incloseth the
angle. Then set one foote of the compasse in the verye point of
the angle, and with the other fote draw a compassed arch from the
one lyne of the angle to the other, that arch shall you deuide
in halfe, and then draw a line from the angle to y^e middle of y^e
arch, and so y^e angle is diuided into ij. equall partes.

[Illustration]

_Example._

Let the triangle be A.B.C, then set I one foot of y^e compasse in
B, and with the other I draw y^e arch D.E, which I part into ij.
equall parts in F, and then draw a line from B, to F, & so I haue
mine intent.

THE IIII. CONCL.

To deuide any measurable line into ij. equall partes.

[Illustration]

Open your compasse to the iust length of y^e line. And then set
one foote steddely at the one ende of the line, & w^t the other
fote draw an arch of a circle against y^e midle of the line,
both ouer it, and also vnder it, then doo lykewaise at the other
ende of the line. And marke where those arche lines do meet
crosse waies, and betwene those ij. pricks draw a line, and it
shall cut the first line in two equall portions.

_Example._

The lyne is A.B. accordyng to which I open the compasse and make
.iiij.