What is the area of a square computer screen with 21-in. sides?
A square computer screen will have the formula similar to the area of a square, only.
Answer: The area of a computer screen with 21-in. sides is 441 square inches.
Let us go through the explanation to understand better.
Area of square = (Side)2
Side of computer screen = 21 in.
Area of computer screen = (21)2 = 441 sq. in.