Each rung below teaches one small idea, shows you a worked example first, then asks you a short question about the exact same idea. Answer it, watch the confetti (or the explanation) and keep climbing. By Step 11 you'll be ready for the actual exam question — and three bonus problems after it lock the skill in for good.
△ABC ≅ △BFA. Find AB/BC. — this is the exact problem waiting at Step 11.