The figure shows triangleABC in which AB =3 , BC=7 .AB is produced to D such that angle BCD = 80度 and angleBDC=70度
Find
a) the lengths of AC and BD ,
b) the area of triangle ACD
急 ~~`中二數學問題(一條)~~要步驟~~求人回答~
2013-08-12 3:12 am
回答 (2)
2013-08-12 3:30 am
2013-08-12 4:28 am
中二應該未會sine rule 及cosine rule。
收錄日期: 2021-04-20 14:11:14
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https://hk.answers.yahoo.com/question/index?qid=20130811000051KK00226