A ladder, 6m long, rests against a wall. The foot of the ladder is 2.5m from the base of the wall. What angle does the ladder make with the ground?
Since we know an adjacent side (2.5) and the hypoteneuse (6) of a right tringle, we can use the cosine inverse to find this..... we have
cos -1 (2.5 / 6 ) = about 65.38°