A square has an area of 81 m². What is its perimeter?
Correct answer: A. 36 m
The side of the square is √81 = 9 m, so the perimeter is 4 × 9 = 36 m. Area and perimeter use different formulas, so always find the side first.
medium
Answer and explanation
The correct answer is A. 36 m
The side of the square is √81 = 9 m, so the perimeter is 4 × 9 = 36 m. Area and perimeter use different formulas, so always find the side first.
Topic: Measurement, Geometry and Money MCQs · Subject: Numerical Ability