45. Which of the following best describes an activity that involves calculating perimeter?
Answer: 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.
Calculating perimeter involves measuring the lengths of the sides of a shape and summing them to determine the total distance around it. Option D accurately describes this process as it specifies using a ruler to measure the dimensions of a rectangular shape and finding the total perimeter.
A) Using a measuring cup to fill a jar with water to determine the quantity of water the jar can hold
This option does not involve calculating perimeter; instead, it focuses on measuring volume. The activity pertains to determining how much liquid a container can hold, which is unrelated to the concept of perimeter.
B) Covering a box with wrapping paper and estimating the quantity of paper used
While this option involves measuring, it is more aligned with surface area rather than perimeter. Estimating the amount of wrapping paper needed involves considering the total area of the surfaces, not the distance around the box.
C) Drawing the outline of a rectangle on graph paper and counting the number of grids in the rectangle
This option may initially seem related to perimeter but is actually about area. Counting the grids within the rectangle does not provide the measurement of the perimeter, which specifically requires adding up the lengths of the sides.
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
This option correctly describes the activity of calculating perimeter. It involves measuring the length and width of a rectangular object and summing those measurements to find the total distance around it, which is the definition of perimeter.
Conclusion
Option D is the only choice that accurately encapsulates the process of calculating perimeter by measuring side lengths and summing them. All other options either relate to volume, surface area, or do not involve the necessary calculations to determine perimeter. Thus, D stands out as the definitive correct answer.