Question

已知：如圖，AB⊥CD，垂足為O，EF經(jīng)過(guò)點(diǎn)O，∠２＝４∠１，

求∠２，∠３，∠ＢＯＥ的度數(shù)（12分）

 

Answer 1

解：∵AB⊥CD

                                                                    ∴∠COB=90⁰

                                                                                                        ∵∠COB=∠1+∠2，∠２＝４∠１

                                                                      ∴∠1=18⁰   ∠２＝72⁰

                                                                                                            ∴∠3=∠1=18⁰

              ∠ＢＯＥ=180°—∠1=162°

解析:略