The length of the square is 12 cm because each side of a square is equal and area is equal S*S You will do the opposite of squaring, which is square root and the square root of 144 is 12
Using the concept of pythagoras theorem, here we have the base and hypotenuse given hence we need to find the third dimension, assuming the wall is perfectly straight and forms a right angle with the bsse of the ladder. Here, and making a the subject of the formula then and substituting 30 ft for c and 0.25*30=7.5 ft for b then