△ABC中,∠BAC=90°。。。
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发布时间:2022-04-30 00:16
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热心网友
时间:2022-06-27 00:34
三角形abd与三角形ace,ab=ac,都有一个直角,还有角eac=dab
所以两三角形全等,ce=ad,ab=ac=2ad=2ce
热心网友
时间:2022-06-27 00:34
△adf近似于△adb 很好证明
△ace近似于△adf
-》△ace近似于△adb
+ ac=ab
-》△ace=△adb
->ad=ce
2ad=ab
->AB=2CE
热心网友
时间:2022-06-27 00:35
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