Area of rectangle 8 × 5.

## The reasoning The **formula for the area of a rectangle** is: **Area = length × width** Here, length = 8 and width = 5. So: Area = 8 × 5 = **40 square units** That's it! Area measures how much space is *inside* the rectangle — like counting how many 1×1 tiles would cover the floor. When you have 8 rows with 5 tiles each, you get 8 × 5 = 40 tiles total. ## Why the wrong options tempt you **A) 13** — This is 8 + 5. You've calculated the *sum* instead of multiplying. That's like counting just the edges, not the space inside. **B) 26** — This is the *perimeter*: 2(8 + 5) = 26. You've gone around the rectangle's border, not filled it. **D) 80** — This is 8 × 10 or maybe you accidentally doubled. Simple calculation slip. ## Quick takeaway **Area = multiply the sides; Perimeter = add them and double.** For rectangles, always *multiply* length by width to find the space inside!