cludi ab egrediente yſopleuroivniformis yſopleurꝰ/ maneiq; femper nu⸗ Producta itaqʒ quadrati jatera/ in rectum:rectos quoqʒ angulos procre⸗
ant extra quadratum; nec v llo pacto concutrentes: qu adratum vnifor⸗
mẽ egrediente quadrato circunſcribu nt. ſed ſimplicem/ nudum et icir⸗
euntenrein
CApenthagono/ omnes deĩceps multãgule figure: paribꝰ ) ſed egredientium angulorum figuris:exteriore aterum con⸗ curlu coituue circunſcribuntur.
¶Nam penthagoni angulus et ceterarum omnium multa ngularium fi⸗ gurarum angul:lunt obtuſt. Producta itaq;ʒ earum latera in directum: cuca eaſdem figuras/ angulos claudunt acutos.tandemq; concurrentes:— primas atq; vniformes figurasparibusſ eiuſdemqʒ ſpe ciei/ ſed egredientium angulorum figuris inueſtiũt/cir (Cumuſubet egredientium angulorum figu ꝛꝛ re coniunctis per rectas lineas extremis angu N ls:quod adicitur ſpacium/ primo in pentha⸗
— equale eſt egre dienti penthagono. In
exagono ſubduplum:In heptagono/ſubtriplum. Inoctogonoſubquadtu plumtatq; ita deinceps. 8 i¶ St penthægonus a bed e:cuius latera in directum pro⸗ ducta conflẽt penthagonum egredientium an gulorumfg hik. Hutus vero egredientis penthagoni! extremiangu⸗ li copulentur per rectasIg. gh. h1.iket Kf. Dico quoniam ſpacium quod ab his quinq; rectis/ adiectum eſtegredien⸗ tipenthagono Ighi kꝛequum eſt eidem. Hoc ei ſpaciũ ſũt quiq; triangui fa g.gbh.ho1.i d K.& k ef. qui quinq; triã gul ſimul ſumpti:ſunt equales totiinterioripenthagono/ egrediuntium angulotum fghK. Hic enim conſtat᷑ exin teriore vniformi penthagono i b cd eꝛet quinq; triangulis agb.bhe.cid. d ke.et e f a. Et hanc equalitatem/ mani 1 feluus intueberis:productis quinqʒ lineis/ ab angulis ex⸗ † tremis:ad punctum l totius penthagoni centrum. Namttian gulus f a gꝛequale eſttriangu
lari ſpacio łl g a:ſimiliter et trangulus gb hitriangulari ſpacio gl bh Triangulus vero h ci: equus eſt triangulari ſpaciohlic. Trian gulusitem 8 2 1dk trangulari ſpacio ilkd. Triangulus deniq;ke f:
ſpacio triangulari k Ife. Hoc enim liquet productis aliis quiqʒneis:a centro lad mediatotius penthago⸗/— nilatera ſcilcetl a m. lbn. Ico. Idp.et leq. Erit enim e 2 5
triangulus fa g ſiue duo triangulif᷑ a m et ga mꝛequi ls argue. Totus igitur egrediens penthagonꝰ a gb h a— cfi d Kef:equus eſtexteriori ſpacio/ quod per quin; S 6
n
duobusttianguls fla et g la. Et itade ceteris triãgu⸗ hneas gh. h1. ik Kf.& fg eidẽ eſt adiectũ. Idẽ quoq; pẽ thagonus egrediens:totiꝰ penthagoni f gh1Kmedi
etas eſt· Conſtat enim penthagonusfghi kiex egre⸗ diente pentha gono et quinqʒ triangulis adiectis/ qui
egredienti pentha gono ſunt equi.i¶Sit rurſum hexagonus abe f. euius omnia latera producta ciaudant egredientem Hexagonumghiklm.eruntq; ab egrediente exagono