# Math Help - vectors-- i need help urgently

1. ## vectors-- i need help urgently

Attached i have a diagram that shows a cube, OABCDEFG, where the length of each edge is 5cm. Express the following vectors in terms of i, j, and k.

(a) vecetor OG
(b) vector BD
(c) vector EB

thanks

2. Originally Posted by miley_22
Attached i have a diagram that shows a cube, OABCDEFG, where the length of each edge is 5cm. Express the following vectors in terms of i, j, and k.

(a) vecetor OG
(b) vector BD
(c) vector EB

thanks
This should have been placed in the original post.

Here are the (x, y, z) coordinates for the following points:
O (0, 0, 0)
B (5, 5, 0)
D (0, 5, 5)
E (0, 0, 5)
G (5, 5, 5)

So, for example, OG is (in coordinate form)
(5, 5, 5) - (0, 0, 0) = (5, 5, 5)
In vector form this is $5 \hat{i} + 5 \hat{j} + 5 \hat{k}$

The other two are similar.

-Dan