chapter 13 perimeter and area mcgraw hill answer key

As a website operator, it is important to keep a close eye on the content that you publish. This is especially true if your website is aimed towards education, as incorrect or incomplete information can lead to confusion, frustration and lost interest in learning. One particular area of mathematics that requires careful attention is perimeter and area. In this article, we will explore Chapter 13 of the McGraw Hill Perimeter and Area Answer Key and discuss the importance of accuracy and detail when teaching these topics.


The concept of perimeter is simple: it is the distance around the edge of any two-dimensional shape. However, there are many subtleties to this seemingly straightforward calculation. A key challenge for educators is to ensure that students understand the different units of measurement that can be used to measure perimeter, such as inches, feet or meters. Students must also learn the formulas for calculating perimeter for different shapes, such as rectangles, triangles, circles and irregular polygons.

One of the greatest challenges in teaching perimeter is helping students to understand the difference between perimeter and area. Many students have trouble seeing these two concepts as distinct, and may conflate them in their minds. It is important to emphasize that perimeter is a measurement of length, while area is a measurement of surface. Providing clear and distinct examples of each concept can help make this distinction clear.


Area is the measurement of surface within the boundaries of a two-dimensional shape. In teaching students about area, it is important to ensure that they understand how to calculate the area of different shapes. Again, the formulas for calculating area vary depending on the shape being measured. Rectangles, triangles, circles and irregular polygons all have their own specific formulas for calculating area.

When teaching area, it is also important to provide students with practical examples of how it is used in everyday life. For example, they can relate area to the amount of paint needed to cover a room, or the amount of carpet required to cover a floor. Making these real-world connections can help students to understand the relevance of this concept.

Accuracy and Detail

Perhaps the most important aspect of teaching perimeter and area is ensuring that the information provided is accurate and detailed. Educators must take care to provide students with clear instructions, accurate formulas and detailed examples. Additionally, they must also take steps to ensure that the answers provided in textbooks, workbooks and answer keys are accurate and reliable.

To illustrate the importance of accuracy and detail, let’s consider the example of a rectangle with sides measuring 5 inches and 10 inches. To properly calculate the perimeter, students must add up all four sides, which would come to 30 inches. To calculate the area, students would multiply the length by the width, yielding an area of 50 square inches. One incorrect calculation, one missed step or one wrong formula could throw off the entire process, leading to incorrect answers and misguided learning.

In conclusion, perimeter and area are two critical concepts in mathematics education. They require careful attention to detail and accuracy, clear explanations and practical examples to ensure that students truly understand these concepts. As a website operator, it is our responsibility to provide students with the best possible information and resources to help them succeed. The McGraw Hill Perimeter and Area Answer Key is just one example of how educators can provide high-quality instructional materials to support student learning.


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