Finding Perimeter of Composite Figures with Missing Sides

In this video, Mr. J explains how to find the perimeter of composite figures by first determining any missing side lengths. The video includes two examples where the missing side lengths are calculated using given measurements, followed by adding all side lengths to find the perimeter. The video concludes with a summary of the steps involved in finding missing side lengths and calculating the perimeter.

What is the definition of perimeter in mathematics?

• The area covered by a two-dimensional figure

• The length of the longest side of a figure

• The distance around a two-dimensional figure

• The volume of a three-dimensional object

Why is it important to find missing side lengths when calculating perimeter?

• To convert the figure into a three-dimensional object

• To accurately add up all the sides of the figure

• To ensure the figure remains two-dimensional

• To make the calculation more complex

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CCSS.3.MD.D.8

How do you calculate the missing bottom side length in the first example?

• Adding the length of all vertical sides

• Subtracting the top side length from the total perimeter

• Adding the top side length to another given side length

• Multiplying the top side length by two

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CCSS.3.MD.D.8

What is the perimeter of the figure in the first example?

• 32 feet

• 34 feet

• 36 feet

• 38 feet

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CCSS.3.MD.D.8

In the first example, how many sides does the figure have?

• Six

• Four

• Seven

• Five

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CCSS.2.G.A.1

What unit of measurement is used in the first example?

• Centimeters

• Inches

• Feet

• Meters

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CCSS.4.MD.A.1

How is the missing side length calculated in the second example?

• By subtracting one side length from another

• By dividing the total perimeter by the number of sides

• By adding two side lengths together

• By adding three side lengths together

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CCSS.3.MD.D.8

What is the perimeter of the figure in the second example?

• 94 meters

• 96 meters

• 98 meters

• 100 meters

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CCSS.3.MD.D.8

How many sides are there in the figure from the second example?

• Nine

• Eight

• Seven

• Six

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CCSS.2.G.A.1

What unit of measurement is used in the second example?

• Feet

• Inches

• Centimeters

• Meters

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