Calculating Perimeter and Composite Figures

The video tutorial explains how to find the perimeter of a composite figure made of two rectangles. It covers identifying missing lengths using fact families and calculating the perimeter by adding all side lengths. An alternative method is also discussed, which simplifies the process by using fewer lengths. The tutorial emphasizes understanding the relationship between different side lengths and provides a step-by-step approach to solving the problem.

What is a composite figure?

• A circle with a square

• Two or more shapes combined

• A single rectangle

• A triangle with a rectangle

Why is it challenging to find the perimeter of the given composite figure?

• All side lengths are known

• Some side lengths are missing

• The figure is a triangle

• The figure is a circle

What is the first step in finding the missing red side length?

• Guess the length

• Add all known lengths

• Use a fact family

• Multiply the known lengths

If the total length is 9 and one part is 3, what is the length of the other part?

• 12

• 6

• 3

• 9

What is the length of the red side after calculation?

• 12

• 6

• 9

• 3

How is the missing purple side length related to the blue length?

• It is the same as the blue length

• It is unrelated

• It is part of the blue length

• It is twice the blue length

What is the length of the purple side after calculation?

• 6

• 10

• 2

• 8

What is the total perimeter of the composite figure?

• 48

• 18

• 38

• 28

Which side length is added first when calculating the perimeter?

• The blue side

• The orange side

• The green side

• The purple side

What is the final step in calculating the perimeter?

• Subtracting the lengths

• Dividing the lengths

• Multiplying the lengths

• Adding all the side lengths