Difficulty: Hard

Average Score: 41%

Which of the following best describes an activity that involves calculating perimeter?

Rationale

Using a ruler to measure the length and width of the cover of a book and then finding the total dimension around the cover.

Calculating perimeter involves measuring the lengths of the sides of a two-dimensional shape and summing these measurements to determine the total distance around the figure. In this case, measuring the length and width of a book cover directly relates to finding its perimeter.

A (Using a measuring cup to fill a jar with water to determine the quantity of water the jar can hold) YOUR ANSWER

This activity is related to volume measurement, not perimeter. The measuring cup is used to quantify the amount of liquid that the jar can contain, which pertains to three-dimensional space rather than the two-dimensional outline necessary for calculating perimeter.

B (Covering a box with wrapping paper and estimating the quantity of paper used) YOUR ANSWER

While this activity might involve some measurements, it focuses on surface area rather than perimeter. Estimating the quantity of wrapping paper relates to how much material is needed to cover the entire surface of the box, which is a different mathematical concept.

C (Drawing the outline of a rectangle on graph paper and counting the number of grids in the rectangle) YOUR ANSWER

This option involves counting the area represented by the grid squares within the rectangle, rather than calculating perimeter. Although drawing the outline is relevant, the main focus here is on the interior coverage, not the distance around the shape.

D (Using a ruler to measure the length and width of the cover of a book and then finding the total dimension around the cover) CORRECT

This choice accurately describes the process of calculating perimeter. By measuring the length and width of the book cover, one can apply the formula for perimeter (2 times the length plus 2 times the width) to find the total distance around the cover.

Conclusion

Calculating perimeter specifically requires measuring the lengths of the sides of a two-dimensional object and summing them. The correct answer encompasses this definition by describing the measurement of a book cover's length and width to find the perimeter. Other choices either focus on volume, surface area, or area counting, which are distinct mathematical concepts unrelated to perimeter calculation.

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