Maths problem: how to do, thanks?
回答 (1)
2021-01-02 11:26 pm
✔ 最佳答案
△ABC ～ △ADEAC/AB = AE/AD
1o/8 = (8+14)/(1o+CD)
∴ CD = 22/(1o/8) - 1o = 7.6 (cm)
DE = √(AE^2-AD^2) = √(22^2-17.6^2) = 13.2
EC = √(13.2^2+7.6^2) = √232
圓BCDE半徑 = √232/2 = √58(cm)
收錄日期: 2021-04-24 08:09:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210102133507AAtSIwi