數學mc

火中有火

先係radius...唔使樓主1樓個方法咁辛苦...

再來...
(x-1)^2+(y-1)^2=1
and
x/3+y/4=1

(咁睇係咪快+爽先?)

火中有火

well u know radius is 1 la
since tangents from a point are of equal length
R dissect QR 3:2
then coo ...
[H]bunbunbunbun 發表於 6-1-2012 04:17

    好想知你點睇個3:2的比例出來