math question F.1

2008-02-13 11:58 pm
1. the area of paralleogram ABCD is 202.5. the length of AB is 2.5 times the

corresponding height h . find the AB and h.


點做&點解

回答 (2)

2008-02-14 2:35 am
✔ 最佳答案
A B
______________
|..........................|
|..........................| h
|_____________|
C 2.5h D

Area=202.5cm^2

長方形面積=底x高
202.5=2.5hxh
202.5=2.5h^2
h^2=81
h=9cm

AB=2.5xh
=2.5X9
=22.5cm

∴h=9cmB=22.5cm

(圖中既....唔洗理)

hope I can help U

2008-02-13 18:36:22 補充:
ABCD個位,對唔正,sor ^^"
參考: me
2008-02-14 12:05 am
首先要知道paralleogram既area點計啦..
我相信你知=]
given AB(底) 係h既2.5倍.. 即係2.5h
而area亦given.. 係202.5

所以用番條公式乘個area出黎..
2.5h(h) = 202.5
2.5h^2 =202.5
h^2 = 81
h =9
∴h=9,AB=2.5X9 = 22.5

2008-02-13 16:06:39 補充:
你冇提及unit..如果有既話寫番(cm)/(m)..考試pp-1就唔抵啦a_a
參考: 本人..


收錄日期: 2021-04-13 15:08:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080213000051KK02627

檢視 Wayback Machine 備份