Understanding Perimeter

The video tutorial explains the concept of perimeter, which is the length of the boundary of a shape. It provides examples of calculating the perimeter for different shapes, including a triangle, rectangle, pentagon, and an irregular polygon. The tutorial uses both standard units and a made-up unit called 'gnus' to demonstrate the calculations.

What does the term 'perimeter' refer to in mathematics?

• The width of a shape

• The area of a shape

• The length of the boundary of a shape

• The volume of a shape

How do you calculate the perimeter of a triangle with sides of equal length?

• Add the length of one side to the area

• Multiply the length of one side by three

• Add the lengths of all three sides

• Multiply the length of one side by four

If a rectangle has sides of 3 meters and 5 meters, what is its perimeter?

• 20 meters

• 16 meters

• 15 meters

• 18 meters

What is the perimeter of a pentagon if each side is 2 gnus?

• 10 gnus

• 12 gnus

• 8 gnus

• 14 gnus

How can you calculate the perimeter of a shape with sides of different lengths?

• Multiply the longest side by the number of sides

• Add the lengths of the longest and shortest sides

• Multiply the shortest side by the number of sides

• Add the lengths of all the sides