A small heater is in the shape of a square pyramid each side of the pyramid's base measuers 30.5 centimeters. The slant height of the pyramid is 164.8 centimeters. what is the height of the pyramid?

Please give an answer to this and give a step by step explanation on what to do to solve this. Will give BRAINLIEST to the person who does what I asked and gives the correct answer with an reasonable explanation.