[311.] PROPOSITION VIII. Theoreme.

[312.] Demonstration.

[313.] Définitions.

[314.] I.

[315.] II.

[316.] PROPOSITION IX. Theoreme.

[317.] Demonstration.

[318.] PROPOSITION X. Theoreme.

[319.] Demonstration.

[320.] PROPOSITION XI. Probleme.

[321.] Solution.

[322.] PROPOSITION XII. Probleme.

[323.] Solution.

[324.] Demonstration.

[325.] Corollaire.

[326.] Fin du troiſieme Livre.

[327.] NOUVEAU COURS DE MATHÉMATIQUE. LIVRE QUATRIEME, Qui traite des propriétés des Triangles & des Parallelo-grammes. Définitions.

[328.] PROPOSITION I. Theoreme.

[329.] Demonstration.

[330.] Corollaire I.

[331.] Corollaire II.

[332.] Corollaire III.

[333.] Corollaire IV.

[334.] Definition.

[335.] PROPOSITION II. Theoreme.

[336.] Demonstration.

[337.] PROPOSITION III, Theoreme.

[338.] Demonstration.

[339.] PROPOSITION IV. Theoreme.

[340.] Demonstration.