Geometry/Chapter 13

Complementary angles are angles that share the same vertex and are equal to 90º.

| / | 45º / | / | / 45º |__/ |/_|_______________

Supplementary angles are angles that share the same vertex and are equal to 180º.

90º                    ___|__               90º

_________________|__|__|____________________

Vertical Angles

In the above diagram, A and C are vertical angles, and B and D are vertical angles. Vertical angles are congruent.

Exercises

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• Motivation
• Introduction
• Geometry/Chapter 1 Definitions and Reasoning (Introduction)
• Geometry/Chapter 2 Proofs
• Geometry/Chapter 3 Logical Arguments
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• Geometry/Chapter 5 Triangle: Congruence and Similiarity
• Geometry/Chapter 6 Triangle: Inequality Theorem
• Geometry/Chapter 7 Parallel Lines, Quadrilaterals, and Circles
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• Geometry/Chapter 9 Prisms, Pyramids, Spheres
• Geometry/Chapter 10 Polygons
• Geometry/Chapter 11 R, R², R³
• Geometry/Chapter 12 Angles: Interior and Exterior
• Geometry/Chapter 13 Angles: Complementary, Supplementary, Vertical
• Geometry/Chapter 14 Pythagorean Theorem: Proof
• Geometry/Chapter 15 Pythagorean Theorem: Distance and Triangles
• Geometry/Chapter 16 Constructions
• Geometry/Chapter 17 Coordinate Geometry
• Geometry/Chapter 18 Trigonometry
• Geometry/Chapter 19 Trigonometry: Solving Triangles
• Geometry/Chapter 20 Special Right Triangles
• Geometry/Chapter 21 Chords, Secants, Tangents, Inscribed Angles, Circumscribed Angles
• Geometry/Chapter 22 Rigid Motion
• Geometry/Appendix A Formulas
• Geometry/Appendix B Answers to problems