Advanced MathEasyPerimeter of a square as an expression
Advanced Math practice question
A square has side length 3x. Which expression gives its perimeter?
- A. 12xCorrect
- B. 9x²
- C. 6x
- D. 3x + 4
Answer: A. 12x
Four sides of 3x each: 4(3x) = 12x.
Why the other answers are wrong
- B. 9x²
- 9x² is the area.
- C. 6x
- 6x counts only two sides.
- D. 3x + 4
- Adding 4 is not the same as multiplying by 4.
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