[741.] II.
[742.] III.
[743.] IV.
[744.] V.
[745.] Corollaire I.
[746.] Corollaire II.
[747.] Remarque.
[748.] VI.
[749.] VII.
[750.] VIII.
[751.] IX.
[752.] Calcul des Triangles rectangles. PROPOSITION I. Probleme.
[753.] PROPOSITION II. Probleme.
[754.] PROPOSITION III. Probleme.
[755.] PROPOSITION IV. Probleme.
[756.] PROPOSITION V. Probleme.
[757.] PROPOSITION VI. Theoreme.
[758.] Démonstration.
[759.] PROPOSITION VII. Theoreme.
[760.] Demonstration.
[761.] PROPOSITION VIII. Probleme.
[762.] Lemme.
[763.] Demonstration.
[764.] PROPOSITION IX. Probleme.
[765.] PROPOSITION X. Theoreme
[766.] Demonstration.
[767.] PROPOSITION XI. Probleme.
[768.] PROPOSITION XII. Theoreme.
[769.] Demonstration.
[770.] PROPOSITION XIII. Probleme.