畢氏定理的問題，THX
2011-10-12 7:06 am
回答 (2)
2011-10-12 7:18 am
✔ 最佳答案
BD^2 = 33^2 - AD^2 = 56^2 - CD^2Since CD = 65 - AD
33^2 - AD^2 = 56^2 - (65 - AD)^2
1089 - AD^2 = 3136 - 4225 + 130AD - AD^2
AD = 2178/130
Sub. back, BD = 28.4308
2011-10-13 2:33 am
AD+DC=65
2AD=65
AD=32.5
AD^2+BD^2=AB^2
32.5^2+BD^2=65^2
BD^2=65^2-32.5^2
BD=56.3
2AD=65
AD=32.5
AD^2+BD^2=AB^2
32.5^2+BD^2=65^2
BD^2=65^2-32.5^2
BD=56.3
參考: a^2+b^2=c^2
收錄日期: 2021-04-26 14:56:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111011000051KK01009