How do we find the area of a rectangle?

• A. Length x width
• B. Radius x diameter
• C. Perimeter x height
• D. Volume x depth

Answer: (A)

To find the area of a rectangle, multiply its length by its width. The length runs along one side and the width along the adjacent side, and multiplying them counts how many unit squares fit inside the shape. For example, a rectangle that is 8 units long and 3 units wide has an area of 8 × 3 = 24 square units.

This approach matches the way space inside a flat shape is measured. The other expressions don’t apply to rectangles: radius and diameter belong to circles, not rectangles; perimeter is the boundary length and height is a vertical measure, and multiplying those doesn’t give interior area; volume involves three dimensions, which isn’t relevant to a flat rectangle.