問下數學....幫幫忙...!!

2006-11-02 5:48 am
1. v=u+5t

a=2分之1 ab,當中a代表三角形的面積,a代表底邊長和b代表高度.

2.如果a=3 , b=6,求a.

回答 (3)

2006-11-02 5:55 am
✔ 最佳答案
1. 你係咪問change of varible?
v = u + 5 t
u = v - 5t
t = (v - u) / 5

2
A = 1/2 ab

if a = 3 , b =6
A = 1/2 * 3 * 6
A = 9

if A =3, b =6
3 = 1/2 * a * 6
a = 1
你係唔你想求area?
3×6
= -------
2

18
= ----
2

=9(c㎡)

2006-11-01 22:01:39 補充:
3×6------- 218---- 2=9c㎡/㎡/k㎡ (視乎你要的面積單位)
2006-11-02 5:53 am
a=1/2(3)(6)
=9
參考: 我


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