i 
: 
PHYSICAL anv LITERARY. 125 
From this, the following con iréFion may 
be deduced, 
CONSTRUCTION. 
In the femicircle take the point F, and let 
_ the arc AFB be tothe arc BF as 7 is to 
q3 join CF, DF, and draw CG parallel 
to DF, meeting FG,a tangent to the cir- 
cle, at F in G, and the circle in K; 
join DG meeting the circle'in H, and 
join FK, DK; draw the line DE (Prop, 
3.) meeting the circle in E, fo that the 
feGor KDE may be to the fector EDH 
as the {pace KEFK to the {pace GFHG: 
The. femicircle will:beto thefeGtor BDE 
Le: oe tO Ge 
De anker vs the feGor KDE j is to the fector 
| EDH, as the fpace KEFK to the {pace 
GFHG; the fetor EDH: will be to the 
feG&or KDH, as the {pace KEFK to the 
fam, of;the fpaces KEFK, GFHG: But, 
 Dbecanfe the triangles GDK, GFK are e- 
. and the — GHK common to 
both, 
5 ‘we 
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