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# Title: Ioachimi Iungii Philos. ac Medic. D. & Gymnasii Hamburgensis Rectoris Geometria Empirica (shelfmarks Leibn. Marg. 9a; ZEN Leibn. Marg. 9a)
# Folio 19, page id 73061350X:0027
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28. Datoparallelosrammo BCDE, aquale eexqui
ansulum parallelogrammum, ad datam rectam A ap.
Plicare, (hoc est parallelogrammum construere, cujus
unum lacusrecta Ax qua lC (IC)
ParalleloorammiBCDF lacere uno, quod liber, nimirum
BC. Producto per C relecetur ex cocl aequalis ipH A, eE C5-
Pleatur parallelogrammu DCFC. Tum ducatur OC, e pron
ducacurdonec sececlarus EB, procuecum inFr: per TI rero
ducarur BLi Parallela FIK, lecans DC produeta in l; CF pro-
ductamm in H, critgi C. IRF parallelogrammu quod quaeritur.
Nota. Si magnicudo laceris daca a propior (hoc eltmi-
nus differens) tuerie majori lateri dlari parallelogram miila-
cusipli Aaequale relecare ex concinuamentominorislateris
commodiusfuerit: ec concra; Si it magnicudinepropior
fuerit minorilareris lacus ip(i Axquale relccandum porius
excontinuamento majoris.
9. Datotrianoulo B, aequale parallelooramum in da
co ansulo A, dataq masnitudinelateris C, ConstiuerC.
Triangulo B aequale tiat parallelogrammumD, in dato
an sulo A, Per 13. vel 14. probl. Porro ParalleloerammoD
aequale e aquiansulum parrallelogrammum applicetur
per 18. Probl. ad dacam lonsicudinem C, nimirum E
criegi E id quod quaeritur.
20. Datorum duorum triansulorum super aequali.
bus basibus aequealtorum BAC, DEF, alterum, V. 8.
DEF ita transferre, lire translocare, uecum altero
BAC habeattum verticem communem; tum batu.
illiusbasi directim (ICams.
Cenro asincerrallo F.D, icemq; incerraIIoFF lccecur BC.
Siopus estproducta, in C_TI. iea ur rectae AC, AII, velin
candem, vel in dirertas plagas perpendiculi ex A in BC in
cellecti, cacacprour ip(xe FD, PF vel in eandé, vel in direr-
Tas placas perpediculi ex E in ipla DFincellecti, ceciderine
Aliter. Cenero A, incerrallounius cruris, r. 8. PF, le-
etione tacta in HI, capiacur basisLIC, aequalisFD. _C. Da-