Teaching Textbooks Geometry

Lessons

• 1 Inductive Reasoning in Egypt and Babylon
• 2 Deductive Reasoning and the Greeks
• 3 Self- Evident Truths
• 4 Logic Chains
• 5 Euclid: The Father of Geometry
• 6 Too Simple to Define
• 7 Some Definitiona sn Postulates
• 8 Line Segments
• 9 Rays and Angles
• 10 Measuring Angles
• 11 Kinds of Angles
• 12 Midpoints and Bisectors
• 13 Properties of Equality
• 14 Formal (and Informal) Proofs
• 15 Complementary Angle Pairs
• 16 Supplementary Angle Pairs
• 17 Adjacent Angles
• 18 Vertical Angles
• 19 Right Angles and Perpendicular Angles
• 20 Drawing Perpendicular Lines Through Points
• 21 Measuring Distance
• 22 Lines That Never Meet
• 23 Parallel Lines and Angles
• 24 More on Parallel Linges
• 25 Measuring the Earth
• 26 Converse Statements
• 27 Proving Lines are Parallel
• 28 A Triangle and its Parts
• 29 Kings of Triangles
• 30 Adding Up the Angles
• 31 Exterior Angles
• 32 Congruent Triangles
• 33 Side-Angle-Side
• 34 Angle-Side-Angle and Angle-Angle- Side
• 35 Hypotenuse-Leg
• 36 Side-SIde-Side
• 37 Overlapping Triangles
• 38 Proving Corresponding Parts are Congruent
• 39 Proving Bisectors
• 40 Proving Lines Parallel or Perpendicular
• 41 Altitudes and Medians of Triangles
• 42 Base Angles of an Isosceles Triangle
• 43 Proving That a Triangle is Isosceles
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56
• 57
• 58
• 59
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 76
• 77
• 78
• 79
• 80
• 81
• 82
• 83
• 84
• 85
• 86
• 87
• 88
• 89
• 90
• 91
• 92
• 93
• 94
• 95
• 96
• 97
• 98
• 99
• 100
• 101 Merging Geometry with Algebra
• 102 Distance and Midpoint
• 103 Slope of a Line
• 104 Linear Equations
• 105 Coordinate Proofs
• 106 Circles and Coordinate Proofs
• 107 Construction
• 108 More Construction
• 109 Transformations
• 110 Non-Euclidean Geometries