請問以下題目點答?
http://photo.qooza.hk/album.php?user=mandy211455&albumid=1201625&page=1
請回答以下三條題目
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maths
2012-01-29 8:47 pm
回答 (1)
2012-01-30 4:30 am
✔ 最佳答案
5)_Since__∆EDA≌∆BAD_(ASA),___and____∆BAD≌∆DCB_(ASA).___So_______DE=CD___Also, CF/FB=1/3____________CF=BC/4___Required area___=(DE)(CF)/2__=(CD)(BC/4)/2__=24/8__=3 [B]6) _Let_∠EAB=x____4∠ABG+6x=360________∠ABG=90°-3x/2________∠GHE=180°-[x+(90°-3x/2)]=90°+x/2________∠GIF=180°-∠FIH=180°-[2x+(90°-3x/2)]=90°-x/2__∠GIF+∠GHE=(90°+x/2)+(90°-x/2)__∠GIF+∠GHE=180° [C]
17) Required age___=(11×30+11×10-40)/10___=40 [A]
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收錄日期: 2021-04-13 18:29:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120129000051KK00289