Geometry and TrigonometryEasyPerimeter of a rectangle
Geometry and Trigonometry practice question
A rectangle has a length of 8 and a width of 3. What is its perimeter?
- A. 11
- B. 22Correct
- C. 24
- D. 48
Answer: B. 22
Perimeter = 2(length + width) = 2(8 + 3) = 22. Choice C (24) is the area (8 × 3) — perimeter is a distance around, not the enclosed area.
Why the other answers are wrong
- A. 11
- You added length and width (8 + 3 = 11) but stopped there — a rectangle has two lengths and two widths, so you must double that sum.
- C. 24
- 24 is the area (8 × 3). Perimeter is the distance around the rectangle: 2(8 + 3) = 22.
- D. 48
- 48 is twice the area (2 × 8 × 3). Doubling belongs on the sum of length and width, not on their product: 2(8 + 3) = 22.
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