Finding Perimeter of Rectangles

This video tutorial by Mr. Math Blog covers the concept of perimeter, focusing on how to calculate it for various shapes, particularly rectangles. The tutorial includes examples using Geo boards, dot paper, and grid paper to demonstrate perimeter calculations. It also explains how to find unknown side lengths when given the perimeter and discusses the ease of calculating perimeter for shapes with equal sides. The video concludes with examples of shapes having a perimeter of 12 units.

What is the main topic of Mr. Math Blog's lesson?

• Understanding perimeter

• Learning about volume

• Calculating area

• Exploring angles

Where can you find all the lessons taught by Mr. Math?

• mathlessons.org

• mrmathblog.com

• mathworld.com

• schoolmath.net

What is perimeter?

• The diagonal of a shape

• The distance around a shape

• The volume of a shape

• The area of a shape

How can you find the perimeter of a rectangle using a Geo board?

• By calculating the area

• By measuring the angles

• By counting the number of units on each side

• By using a protractor

If a rectangle has sides of 3 units and 2 units, what is its perimeter?

• 5 units

• 8 units

• 10 units

• 12 units

How does the perimeter change if the length of the sides increases from 3 to 4 units?

• Remains the same

• Decreases by 1 unit

• Increases by 2 units

• Increases by 1 unit

What is the perimeter of a rectangle that is 5 units wide and 6 units long?

• 18 units

• 20 units

• 30 units

• 22 units

How can you find the unknown side lengths of a rectangle if one side is known?

• By measuring with a ruler

• By guessing

• By using a calculator

• By drawing and labeling the rectangle

If a rectangle has a perimeter of 14 units and one side is 4 units, what are the lengths of the unknown sides?

• 5 units

• 4 units

• 2 units

• 3 units

Why is finding the perimeter of shapes with equal sides easier?

• Because they have more sides

• Because they are irregular

• Because all sides are different

• Because all sides are equal