請睇圖
http://xs314.xs.to/xs314/07172/abc.png
F.2 Plane Geometry
2007-04-25 1:52 am
回答 (2)
2007-04-25 2:01 am
✔ 最佳答案
圖片參考：http://xs314.xs.to/xs314/07172/abc.png
a)
a = √(52 – 42)
= 3cm
b)
因為 PQRS 是一長方形所以對邊相等
b = a = 3cm
c = QR = 4cm
2007-04-25 2:10 am
a^2+4^2=5^2
a^2=5^2-4^2
a=√(5^2-4^2 )
a=3
∵∆PQS(~=)∆RSQ (proved)
∴b=RS=3 (corr. sides(~=)∆s)
C=RQ=4 (corr. sides(~=)∆s)
a^2=5^2-4^2
a=√(5^2-4^2 )
a=3
∵∆PQS(~=)∆RSQ (proved)
∴b=RS=3 (corr. sides(~=)∆s)
C=RQ=4 (corr. sides(~=)∆s)
參考: myself
收錄日期: 2021-04-29 18:13:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070424000051KK02809