Calculating Perimeter of Polygons

The video tutorial explains how to determine the perimeter of an L-shaped polygon. It begins by defining the perimeter as the sum of all side lengths. The tutorial identifies missing side lengths using given measurements and subtraction. Finally, it calculates the total perimeter by adding all side lengths, emphasizing the importance of including units in the final answer.

What is the perimeter of a polygon?

• The distance around the outside of the polygon

• The area inside the polygon

• The volume of the polygon

• The number of sides of the polygon

What information is needed to find the perimeter of a polygon?

• The sum of the angles

• The length of one side

• The height of the polygon

• The sum of the lengths of all sides

How can you find a missing side length if you know the total length of a side and one part of it?

• Subtract the known part from the total length

• Multiply the known part by the total length

• Divide the total length by the known part

• Add the known part to the total length

If a side of the polygon is 12 cm and one part is 2 cm, what is the length of the missing part?

• 8 cm

• 10 cm

• 6 cm

• 14 cm

What is the length of the missing side if the total length is 9 cm and one part is 3 cm?

• 6 cm

• 12 cm

• 9 cm

• 3 cm

What is the first step in finding the perimeter once all side lengths are known?

• Multiply all side lengths

• Add all side lengths together

• Divide the total by the number of sides

• Subtract the smallest side length

Which of the following is the correct sum of the side lengths: 12 cm, 3 cm, 10 cm, 6 cm, 2 cm, and 9 cm?

• 46 cm

• 44 cm

• 40 cm

• 42 cm

Why is it important to include units when calculating the perimeter?

• To ensure clarity and accuracy

• To make the number larger

• To confuse the reader

• To make the calculation easier

What is the final perimeter of the L-shaped polygon?

• 46 cm

• 44 cm

• 42 cm

• 40 cm

What is the significance of carrying over numbers in addition?

• It helps in subtraction

• It is used to check multiplication

• It is not necessary

• It ensures correct addition of multi-digit numbers