hello, i'm currently doing project about human walking...i have a problemm to define the angles for walking step...i can't find the formula..can anybody help me...tq

do you mean the angles the leg pivots to while walking? I don't know where one would get such measurements, but a very easy to use resource would be your own leg, maybe try to walk naturally and estimate the angle or film it and use a protractor on the image :) If this isn't what you're looking for try rephrasing the question.