PROPOSITIONS 1-26, BOOK I, ARE NOW PUBLISHED IN A SIMILAR FORM TO THIS. PROPOSITION XVIII. The greater side of every triangle is opposite to the greater angle. Let be a triangle, of which the side Then the angle is greater than the side shall be greater than the angle PROPOSITIONS 1-26, BOOK I, ARE NOW PUBLISHED IN A SIMILAR FORM TO THIS. Let Then any PROPOSITION XVII. Any two angles of a triangle are together less than two right angles. be any triangle. two of its angles together shall be less than two right angles. In like manner it may be demonstrated, that the angles two right angles, as also the angles Therefore any two angles of a triangle, &c. are less than |