[81.] Demonstration.
[82.] Corollaire I.
[83.] Corollaire II.
[84.] Corollaire III.
[85.] Corollaire IV.
[86.] Corollaire V.
[87.] Corollaire VI.
[88.] Corollaire VII.
[89.] Corollaire VIII.
[90.] Corollaire IX.
[91.] Corollaire X.
[92.] Corollaire XI.
[93.] Corollaire XII.
[94.] Corollaire XIII.
[95.] Corollaire XIV.
[96.] Corollaire XV.
[97.] Corollaire XVI.
[98.] Corollaire XVII.
[99.] Corollaire XVIII.
[100.] Corollaire XIX.
[101.] Corollaire XX.
[102.] Corollaire XXI.
[103.] Corollaire XXII.
[104.] Corollaire XXIII.
[105.] Corollaire XXIV.
[106.] Corollaire XXV.
[107.] PROBLEME.
[108.] Solution.
[109.] Demonstration.
[110.] Corollaire I.