Pyramid of Egypt word problem question

Question

The sides of the base of the largest pyramid, Khufu, has length 755 feet. The height of Khufu was originally 482 feet, but now is approximately 450 Feet. Find the slope of a side of the pyramid at its original size and at its present size.

Answer 1

I've never seen this pyramid, so I an assuming that its base is square,so its sides are equal in length 755 ft. If I am understanding this problem correctly, then taking the initial height of 482, and the distance from the center of the pyramid (ground level) is 755/2 = 377.5 ft. The height of 482 & length of 377.5 form a right angle. To find the slope of the side (from ground level), then tan x = opposite/adjacent = 482/377.5=1.2768211920529. Taking the arctan (1.2768211920529) = x = 51.93 degrees.

Doing the same for the height of 450 ft yields the angle of elevation as 50 degrees.