op I 1 p.383 propter...
http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/36225 <http://www.w3.org/nl/lemon/frac#Attestation>
op I 1 p.383 propter...
op I 1 p.383 propterea semirectangulum ipsius cbe, vel ipsius cba hoc est ipsum triangulum cba, equale erit rectangulo cda.