Area of Rectangle
Area = length × width
Use the formula for the area of a rectangle.
Area | = | length × width |
| = | 10 feet × 4 feet |
| = | 40 square feet |
The area of the rectangle is 40 square feet.
Use the given information to set up an equation and solve for the width.
| Area | = | length × width |
9 times some number equals 45 | 45 sq ft | = | 9 ft × width |
related division: 45 ÷ 9 = 5 | 45 sq ft | = | 9 ft × 5 ft |
So, the width of the rectangle is 5 feet.