You have to use sin, it should be on your calculator. Sin is OPPOSITE / HYPOTENUSE. So the opposite side of the 35° angle is how tall the slide is (x) and the hypotenuse is 4.1 m. So u do.. sin(35) = x/4.1 and simplify to 4.1 times sin(35) = x. Type that in on your calculator and you're good to go. (make sure it's in DEG or degrees) You should get about 2.3517!
