Find the area of a rectangle with length 7 and width 3.

Master the NLN PAX Mathematics 1 Exam with our comprehensive study guide and quizzes. Test your knowledge with multiple choice questions tailored for the PAX Math exam, featuring detailed explanations and tips to enhance your preparation and increase your chances of success.

Multiple Choice

Find the area of a rectangle with length 7 and width 3.

Explanation:
Multiplying length by width gives the area of a rectangle. If the length is 7 and the width is 3, the area is 7 × 3 = 21 square units. This counts how much space the rectangle covers inside its boundaries. Because multiplication is commutative, 3 × 7 also equals 21, reinforcing that the order doesn’t change the area. This is different from the perimeter, which would be 2 × (7 + 3) = 20, since perimeter measures edge length, not interior area.

Multiplying length by width gives the area of a rectangle. If the length is 7 and the width is 3, the area is 7 × 3 = 21 square units. This counts how much space the rectangle covers inside its boundaries. Because multiplication is commutative, 3 × 7 also equals 21, reinforcing that the order doesn’t change the area. This is different from the perimeter, which would be 2 × (7 + 3) = 20, since perimeter measures edge length, not interior area.

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