Question

八年级数学题目 谢谢 给好评的

Answer 1

Answer 2

• 证明： ∵矩形ABCD                                                                                                                                                       ∴   ∠ A=∠B ,AD=BC                                                                                                                                            ∴在Rt △ADE和Rt △BCF中                                                                                                                              AD=BC,AE=BF                                                                                                                                                      ∴ Rt △ADE全等于Rt △BCF（HL）                                                                                                                    ∴DE=CF         

Answer 3

解：因为AF=BE
所以AE=BF
又因为 在矩形ABCD中，角A=角B=90度 AD=BC
所以三角形ADE全等于三角形BCF（SAS）
所以DE=BF
要给分啊