Exploring Perimeter Calculation Methods for Rectangles and Squares

The video tutorial explains various methods to calculate the perimeter of rectangles and squares. It demonstrates that the perimeter can be found by adding all edges, using multiplication, or doubling the sum of one length and one width. The tutorial uses examples of a rectangle with dimensions 5 in by 3 in and a square with 2 in sides to illustrate these methods. It emphasizes that all methods yield the same result due to the properties of addition and multiplication.

What is one method to calculate the perimeter of a rectangle?

• Perimeter equals the sum of the length.

• Perimeter equals length times width.

• Perimeter equals the square root of the length plus width.

• Perimeter equals twice the length plus twice the width.

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CCSS.3.MD.D.8

If a rectangle has a length of 5 inches and a width of 3 inches, what is its perimeter?

• 8 inches

• 15 inches

• 20 inches

• 16 inches

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CCSS.4.MD.A.3

What is the perimeter of a rectangle with lengths of 5 inches and widths of 3 inches using the method of adding all edges?

• 12 inches

• 18 inches

• 14 inches

• 16 inches

Tags

CCSS.3.MD.D.8

Why do all the methods for finding the perimeter of a rectangle give the same result?

• Because the area and perimeter formulas are interchangeable.

• Because the length is always longer than the width.

• Because the rectangle's sides are always equal.

• Because addition is commutative and multiplication is repeated addition.

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CCSS.4.MD.A.3

What does it mean that addition is commutative in the context of finding a rectangle's perimeter?

• You can add the sides in any order to get the same result.

• You can only add the sides in a specific order.

• You must subtract the sides instead of adding them.

• You can multiply the sides in any order.

Tags

CCSS.3.MD.D.8

What is the result of doubling the sum of one length and one width of a rectangle?

• Twice the area of the rectangle.

• The same as the area.

• Half of the perimeter.

• The same as the perimeter.

Tags

CCSS.3.MD.D.8

Why is multiplication used as a method to find the perimeter?

• It's faster than addition.

• It's a form of repeated addition.

• It gives a larger number.

• It's only used for squares.

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CCSS.3.MD.D.8

In the context of perimeter, what does it mean that 'multiplication is another way to do repeated addition'?

• Adding sides is not a valid method to find the perimeter.

• Multiplying the sides gives the same result as adding them repeatedly.

• Multiplication always results in a higher number than addition.

• Multiplication is only applicable to squares.

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CCSS.4.MD.A.2

How can the perimeter of a square be calculated?

• By squaring one of the sides.

• By multiplying one side by four.

• By doubling the side and adding two.

• By adding all the edges.

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CCSS.4.MD.A.3

If a square has sides of 2 inches each, what is its perimeter?

• 4 inches

• 10 inches

• 8 inches

• 6 inches

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CCSS.4.MD.A.3