搵三角形ge邊~~!!!!!!!!

2007-05-21 3:07 am
In the figure, PT=4, TR=3, ST=6 and QP//ST. Find QR!

http://hk.myblog.yahoo.com/Felix-Wong9426/photo?pid=1&fid=2
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圖片

要步驟!!!!!

回答 (3)

2007-05-21 3:14 am
✔ 最佳答案
QR/6=(3+4)/4
QR/6=7/4
4QR=42
QR=10.5

2007-05-20 19:16:21 補充:
this數係用比例既原理,仲有交產相乘我自己計架,我中二
2007-05-21 3:18 am
Let x be QR,

(3+4) : 4 = x : 6

4 / 7 = 6 / x

4x = 42

x = 10.5

therefore, QR = 10.5
2007-05-21 3:13 am
你應該係讀中3呢!!
你係數學書入面,係有一條叫做"截線定理"
只要你有PT同TR d2條邊 就可以搵到!!


收錄日期: 2021-04-12 20:29:23
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