Area is the measure of the space inside the shape. Perimeter is the measure of the length around the outside of the shape. You can find the area and perimeter of rectangles, triangles, and other shapes.
Area and Perimeter
Area is the amount of space inside the boundary of a two-dimensional shape. It is measured in square units such as square centimeters, square meters, or square inches. Perimeter is the distance around the outside of a two-dimensional shape. It is measured in linear units such as centimeters, meters, or inches. A rectangle is a four-sided shape with opposite sides that are equal in length and parallel to each other. The formula to calculate the area of a rectangle is length times width, and the formula for the perimeter is (length + width) x 2.
What are the different ways to calculate the area and perimeter of a shape?
What are some real world applications of area and perimeter?
Brain break: Draw a hot dog floating in outer space wearing a cape surrounded by flying french fries.
What is the formula for finding the area of a rectangle?
- Length x Width
- Length + Width
- 2 x (Length + Width)
- (Length - Width) / 2
What is the formula for finding the perimeter of a square?
- 4 x Side Length
- Side Length x Side Length
- (Side Length / 2) x 3.14
- (Side Length - 1) / 2
Which one measures the outside length of an object, perimeter or area?
What are units used to measure area?
- Square units (sq. units)
A rectangle has a length of 5cm and width of 3cm. What is its perimeter?
Work together in pairs: What is the formula for finding the area of a rectangle?
Question: You are an architect responsible for building a playground for a school. How can you use area and perimeter to build the playground? Clues: • Area is the amount of space enclosed by a two-dimensional shape. • Perimeter is the total distance around the outside of a two-dimensional shape. • To calculate area and perimeter, you need to know the length and width of a shape. In pairs: Select and solve one of the tasks: A. Work with a partner to draw a playground using the area and perimeter you have calculated. B. Explain why it is important to use area and perimeter to build the playground accurately.