[301.] PROPOSITION II. Probleme.

[302.] PROPOSITION III. Probleme.

[303.] PROPOSITION IV. Théoreme.

[304.] DÉMONSTRATION.

[305.] PROPOSITION V. Théoreme.

[306.] Demonstration.

[307.] PROPOSITION VI. Theoreme.

[308.] Demonstration.

[309.] PROPOSITION VII. Theoreme.

[310.] Demonstration.

[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.