12611454[Figure 54]
primæ figuræ, quodhbet punctum I, per quod du-
catur planum L Q, plano A G, parallelum. Cum
autem C A, in ſecunda figura ſupponatur æqualis
ipſi B D, in prima, fiat C F, æqualis B I, & per
E, agatur planum E F, A B, C D, planis paralle-
lum. Rectangult m L M Q, primæ figuræ, diui-
ditur in rectangula I M Q, & L I, M Q. Re-
ctangulum I M Q, eſt æquale rectangulis I M P;
catur planum L Q, plano A G, parallelum. Cum
autem C A, in ſecunda figura ſupponatur æqualis
ipſi B D, in prima, fiat C F, æqualis B I, & per
E, agatur planum E F, A B, C D, planis paralle-
lum. Rectangult m L M Q, primæ figuræ, diui-
ditur in rectangula I M Q, & L I, M Q. Re-
ctangulum I M Q, eſt æquale rectangulis I M P;