Principles of Mathematics 11            Answer Key, Contents                                          263
                                                     Module 3: Answer Key 
                     Section 1:        Geometry
                                       Lesson 1       Vocabulary of Circles                                       265
                                       Lesson 2       Geometry of Circles and Chords                              267
                                       Lesson 3       Angles and Arcs of a Circle                                 273
                                       Lesson 4       Properties of Tangents                                      281
                                       Lesson 5       Exploring Polygons                                          287
                                       Review                                                                     291
                     Section 2:        Trigonometry
                                       Lesson 1       The Trigonometric Ratios of Angles 
                                                      0°≤ θ ≤ 360°                                                295
                                       Lesson 2       Related Angles and Solving Trigonometric 
                                                      Equations of Linear Form                                    301
                                       Lesson 3       Solving Triangles                                           307
                                       Lesson 4       The Ambiguous Case                                          313
                                       Review                                                                     223
                     Section 3:        Analytic Geometry I
                                       Lesson 1       Circle                                                      329
                                       Lesson 2       Distance Between Points and Lines                           337
                                       Lesson 3       Systems of Linear Equations                                 345
                                       Lesson 4       Solving Systems of Equations Algebraically                  351
                                       Lesson 5       Systems of Equations Containing 
                                                      Three Variables                                             363
                     Section 4:        Analytic Geometry II
                                       Lesson 1       Applications of Systems                                     369
                                       Lesson 2       Non-Linear Systems                                          375
                                                                                                                   Module 3
                264                                  Answer Key, Contents               Principles of Mathematics 11
                                    Lesson 3      Graphing Linear Inequalities                            389
                                    Lesson 4      Quadratic, Rational, and Absolute Value 
                                                  Inequalities in Two Variables                           399
                                    Lesson 5      Verifying and Proving Assertions in 
                                                  Coordinate Geometry                                     415
                                    Review                                                                423
                Module 3
                   Principles of Mathematics 11              Section 1, Answer Key, Lesson 1                                           265
                                                                                        Lesson 1
                                                                                     Answer Key
                                               1. a)AC
                                                    b)∠∠∠∠∠AOE, EOD, DOC, AOD, COE
                                                         ¼¼ ¼
                                                    c)ABC, AEC, or ADC
                                                         suur
                                                    d)AB
                                                    e)AB, AD, BE, AC, BD
                                                         » » ¼ » » » » » »
                                                    f)AB, AE, AD, DE, CD, BD, CE, BE, BC
                                                    g)∠∠∠∠∠∠∠EBD, ABD, BAD, ABE, DAC,CAB, ADB
                                                         ¼¼¼¼¼¼¼¼¼
                                                    h)BCA, ABE, ABD, EBD, DAC, BAD, CBE, BCE, BEC
                                               2. a)                          E                                    E
                                                                D                                    D
                                                                          O
                                                                          l                                    l
                                                                                     G                                    G
                                                                      F                                    F
                                                                               E                                   E
                                                                 D                                   D
                                                                                                               O
                                                                          l                                    l
                                                                           O
                                                                                      G                                   G
                                                                      F                                    F
                                                                                                                                  Module 3
                   266                                     Section 1, Answer Key, Lesson 1                  Principles of Mathematics 11
                       b)                          E                                   E
                                     D                                   D
                                                                                  O
                                               l                                   l
                                                          G                                  G
                                           F                                  F
                                                   E                                   E
                                     D                                   D
                                               l                                  l
                                                          G                                  G
                                           F                                  F
                       c)   Ð DOE, Ð EOG, Ð FOG, Ð DOF
                       d) Ð DEF, Ð DGF, Ð EDG, Ð EFG
                       e) B, C
                       f)   i)  the interior region bounded by chord DE and minor 
                                arc DE
                            ii) the interior region bounded by chord FG and minor 
                                arc FG
                       g) AB,AC
                   Module 3