Cool Down: It's a Square
Find the area and side length of square ACEG

Answer:
See below
Step-by-step explanation:
Use pythagorean theorem to find the side of the triangle which is the side of the square
side = sqrt ( 8^2 + 4^2) = sqrt 80 units = 4 sqrt 5 units
area = sqrt 80 * sqrt 80 = 80 units ^2