Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 329
. (a!i;i/i)^ … Fig. 162. Oase II. Origin without the polygon. Area ABODE = As OAB + OBO + OOD + OAE - ODE. But A ODE = -^ [x,tj, - x,ij,].Hence, in all cases, the signs of the As are positive..-. Area ABODE = i l[x.y^ - a;,?/.] + [xsy.2 - x^y^]+ [x^js-ocsyi] 4-etc.J= h I ^22/1 - ^i?/2 + ^32/2 - ^22/3^4!/3-^32/4…
Geometry, Analytic
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