Apollonius, of Perga · Venetiis : Apud Bernardum Iuntam · leaf 30
tur L G, cuizqualis pona … Et quoniani quadtilate- rum LEHG ettincircu- | lo,anguli EHG, ELG op- ^ poti duob:cectis (ant ve- qualessfed&anguli ABC, CBK x3jualestunt duo- bus redis, ergo anguli ADC,CBK,angulis EHG; ELG xquales erunt : aus ferantur equales anguli CBK, EL G,reliquus igi- tur ABC, reliquo EH G equalis etit ;fed…
Mathematics, Greek · Geometry -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.