What is the definition of perimeter?
The perimeter of a shape is its total length around the outside It is the sum of all sides of a shape It can be used to calculate the area of a shape
What is the Perimeter of a Shape?
shape: A two-dimensional object made up of lines and curves that is closed. perimeter: The length around the outside of a shape. area: The space inside the boundaries of a shape.
The word 'perimeter' comes from a Greek word meaning 'around the measure'. The perimeter of a circle is called its circumference. The perimeter of a rectangle can be found by adding all 4 sides together.
Work together in pairs: What did you find most interesting about learning about perimeter today?
Work together in pairs: Explain why knowing the perimeter of a shape is important in everyday life.
Brain break: Draw a picture of a robot riding a roller coaster!
What is the formula to calculate the perimeter of a rectangle?
- Area = Length * Width
- Perimeter = 2 * Length + 2 * Width
- Perimeter = Length + Width + Length + Width
- Perimeter = Length * Width
What is the perimeter of a rectangle with a length of 6 cm and a width of 4 cm?
What is the formula to calculate the perimeter of a triangle?
- Perimeter = Length + Width + Height
- Area = Base * Height
- Perimeter = Length + Width + Length
- Perimeter = a + b + c
What is the perimeter of a triangle with sides of length 8 cm, 6 cm, and 10 cm?
What is the perimeter of a square with a side length of 6 cm?