As follows:
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maths~~~~~~~
2010-01-31 6:45 pm
回答 (2)
2010-01-31 8:02 pm
1.---因為AB=DA
-----------x+2=y+3
---------------x=y+1---(1)
2.---因為BC=CD
-------------2x=3y---(2)
3.---代入(1)到(2):
-----2(y+1)=3y
-------2y+2=3y
-------------y=2
4.---x=(2)+1=3
5.鷂形周界=AB+DA+BC+CD
----------------=(3+2)+(2+3)+2(3)+3(2)
----------------=22
-----------x+2=y+3
---------------x=y+1---(1)
2.---因為BC=CD
-------------2x=3y---(2)
3.---代入(1)到(2):
-----2(y+1)=3y
-------2y+2=3y
-------------y=2
4.---x=(2)+1=3
5.鷂形周界=AB+DA+BC+CD
----------------=(3+2)+(2+3)+2(3)+3(2)
----------------=22
收錄日期: 2021-04-23 20:42:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100131000051KK02357