(CHALLENGING!!)Trigonometry / geometry proof Hey guys I've spent a couple hours on this without even coming close. I'm hoping someone here can drop me a hint. From the above image I need to proof that GL is R(THETA) in length. The only other information I have is that GT extended is a type of sheet (metal sheet) balancing and "rocking" forward and backward on the circular structure of radius R (cylinder). Hints or help or links would be of HUGE assistance. Thanks in advance!