Book:Euclid/The Elements/Book II

Contents

 * Book II: Geometrical Algebra
 * Definitions
 * Proposition 1: Real Multiplication Distributes over Addition
 * Proposition 2: Square is Sum of Two Rectangles
 * Proposition 3: Rectangle is Sum of Square and Rectangle
 * Proposition 4: Square of Sum
 * Proposition 5: Difference of Two Squares
 * Proposition 6: Square of Sum less Square
 * Proposition 7: Square of Difference
 * Proposition 8: Square of Sum with Double
 * Propositions 9 and 10: Sum of Squares of Sum and Difference
 * Proposition 11: Construction of Square Equal to Rectangle
 * Proposition 12: Relative Sizes of Sides of Obtuse Triangle
 * Proposition 13: Relative Sizes of Sides of Acute Triangle
 * Proposition 14: Construction of Square Equal to Given Polygon