T M IG ONOMETKY.

i.

3.4

<Def'.3&'l

Theorem2.Tiff. 2.

Theorem-.1.Tie/. /.

I K

Obtuse onffleii Irwnffle,Oio-es x.2.3.4.

c

Mis la n cr.s-.

Ht’i/q/its

Fig. 8.

XHE ^aNDaw ERimao .AmD POHi.TSHnra- iraonim

Fngrcn'ed by H./wiTe.