Apparatus

319Propositio 81a correxi   Propositio 81am C   Propositio 81am in interl. S
320sit S   erit C
321duarum C   duorum S
322quadratae conieci   triangulae S C
323simul conieci   similiter S C
324similiter C   simul S
325pyramidis C   pyramidum S
326erit S   est C
327pi correxi   pus S
328pi correxi   pus S
329pi correxi   pus S