CE maths

講野無point的人

原帖由 ming1989 於 2006-5-9  02:42 PM 發表
maths mc唔識果2條
let O br the orgin.If the coordinates of the points A and B
are(6,0) and (0,6) respectively then the coordinates of
the in-centre of 三角形ABO are:
A. (0,0)
B. (2,2)
C. (3, ...

呢兩條題我都唔識

in-centre唔識咩黎
圓公式又唔識背