Rectangle ABCD translates 4 units down and 2 units to the right to form rectangle A'B'C'D'. The vertices of rectangle ABCD are labeled in alphabetical order going clockwise around the figure. If AB = 3 units and AD = 5 units, what is the length of B'C'?

Question

Mercury · Answer

notice how the rectangle is only being translated. this does *not* change any of the side lengths. so the length of B'C' is equal to the length of BC. draw a diagram of the original rectangle, label the sides, and determine the length of BC