[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.