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t. I (PL 63)

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INTERPRETATIO EUCLIDIS GEOMETRI^. LIB. I. 1322<br />

jEqua triangula in aequis atque"in directum positis<br />

basibiis constituta. et in eisdem partibus, et in eisdem<br />

quoque alternis esse necesse est.<br />

Si parallelogrammum, triangulnmque in eadem<br />

basi atque in eisdem alternis lineis fuerint consti-<br />

tuta, parallelogrammum triangulo duplex esse con-<br />

veniet. C<br />

Justa datam rectam linearo dato triangulo in re-<br />

ctilineo dato angulo parallelogrammum aequale preetendendum<br />

est.<br />

Dato rectilineo sequale parallelogrammum in dato<br />

rectilineo angulo collocare oportet.<br />

Patrol. LXIII.<br />

Omnis parallelogrammi spatii eorum quae circa<br />

eamdem diametrum sunt, parallelogrammorum supplementa<br />

aequa sibi invicem esse necesse est.<br />

K<br />

B G<br />

\<br />

Quadratum<br />

bendum est.<br />

ad datam rectam terminatam descri-<br />

A<br />

""<br />

B<br />

I<br />

D E<br />

In histriangulis in quibus unus rectus est angulus,<br />

quserectiangula nominamus, quadralum quod a la-<br />

ere rectum_angulum subtendente describitur,[aequum<br />

est his quadratis quas alcontinentibus rectum angulum<br />

lateribus conscribuntur.<br />

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