D. 441 sq ft.
21*21
What is the area of a square computer screen with 21-in. sides?
A. 84 sq. in.
B. 220 sq. in.
C. 42 sq. in.
D. 441 sq. in.
please help
2 answers
Area of a square
= (length of each side)²
If each side is measured in inches, the area is in square inches, or in².
= (length of each side)²
If each side is measured in inches, the area is in square inches, or in².
4 answers