My sister asked me for help on how to do this question, and for the life of me I couldn't figure out how to do it. When she was given this question a few days ago, she was only aware of the relationship between opposite sides, adjacent sides, and hypotenuses for sine, cosine and tangent("SOH CAH TOA"). Also note that line h and line b are perpendicular to each other, so there is a right angle where those two line segments meet. So the question is to find h, given that b=50, using no trigonometry other than Pythagoras' Theorem and the "SOH CAH TOA".
Note: For anybody unfamiliar with "SOH CAH TOA", it's just an easy way to remember that