1. The problem statement, all variables and given/known data See attachment 2. Relevant equations eAB=(Lf-Lo)/(Lo) 3. The attempt at a solution Ok, this is not for HW. I am preparing for a mechanics of materials class next semester. I don't understand when CB goes through the 0.3 degree arc, they say the height is still 300mm. Shouldn't it be slightly less than 300mm? If so, then I have only one angle and one non hypotenuse side, I can't figure out how to solve the rest of the new strained triangle. Thank you!