| PART I. | | | Lines | 9 | | | Points | 9 | | | Crooked Lines | 10 | | | Curved Lines | 11 | | | Straight Lines | 11 | | | Other Lines | 11 | | | Positions of Lines | 14 | | | Angles | 17 | | | Relations of Angles | 20 | | | Adjacent Angles | 20 | | | Vertical Angles | 21 | | | Kinds of Angles | 23 | | | Right Angles | 23 | | | Acute Angles | 24 | | | Obtuse Angles | 24 | | | Relations of Lines | 27 | | | Perpendicular Lines | 27 | | | Parallel Lines | 28 | | | Oblique Lines | 28 | | | Interior Angles | 30 | | | Exterior Angles | 31 | | | Opposite Angles | 32 | | | Alternate Angles | 33 | | | Problems relating to Angles | 38 | | | Polygons | 40 | | | Triangles | 44 | | | Isosceles Triangles | 48 | | | Problems relating to Triangles | 53 | | | Quadrilaterals | 55 | | | Parallelograms | 59 | | | Comparison and Contrast of Figures | 62 | | | Measurement of Surfaces | 66 | | | Problems relating to Surfaces | 71 | | | The Circle and its Lines | 73 | | | Arcs and Degrees | 78 | | | Parts of the Circle | 82 | | | PART II. | | | AXIOMS AND THEOREMS. | | | Axioms. Illustrated | 85 | | |
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