Menelai Sphaericorum libri III

adeoque æqua æqualem effe æquales funt æqualibus æqualis angulo æqualis arcui æqualis eſt angulo æqualis eſt arcui æqualis ipſi angu angulos æquales angulo arcubus arcus A B arcus AE arcus BA arcus circuli magni arcus circulorum magnorum bafim baſi baſis bifariam capiantur dico arcum differentiæ ducantur ducatur arcus duo anguli duo arcus æquales duo triangula Sphærica duobus rectis erit arcus erunt femicirculo ficut finus arcus fimul ſumpti fint finum fuerit funt æquales gulus hæc hujus inæquales ipfi ipfis major angulo major arcu major erit major eſt angulo major eſt arcu majorem eſſe majus Menelai minor erit minor eſt minor recto producatur proinde puncto punctum quæ quare angulus quare arcus ratione ſinus arcus rectus reliquus ſimul ſinum arcus ſit Sphæræ ſunt ſuper THEOR trianguli Sphærici triangulum Sphæricum ΓΔ