# Computer Graphics Assigment Help

1. Feb 2, 2008

### kekido

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
I know how to solve B. Since the point C is on AB. $$Z_C=tZ_A+(1-t)Z_B$$, then since t is a function of $$Z_A$$, $$Z_B$$ and s, we can write Z_C as a function of those.

However, I don't have a clue for part A. Triangle OAB and Oab are not similar.