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Practice withPerimeter & Area
Gianni’s PizzaGianni & Jen were asked to design two rectangular pizzas, each with an area of 36 in2, but each with a different perimeter.
Use square tiles to complete this task.
Gianni’s Pizza
What is the area for each pizza?
What is the perimeter for each pizza?
Rectangles, Rectangles, Rectangles
Use 20 square tiles to create a rectangle.
Rectangles, Rectangles, Rectangles
Use 20 square tiles to create a rectangle.
How many different rectangles can you make?
Same Perimeter, Same Area
Draw a shape with a perimeter of 12 centimeters.
P = 12A = 8
Racing Rectangles
Draw a shape with a perimeter of the dice.
Rectangles Tiles
Create rectangle with tiles.15
PerimeterHow can you find the perimeter of each of these shapes?
PerimeterAdd all sides!
Can you write a FORMULA for perimeter of any:
Triangle?
Quadrilateral?
Pentagon?
AreaHow can you find the area of each of these shapes?
Area FormulasSquare
Rectangle
Parallelogram
Triangle
Trapezoid
Area of a square
3”
3”
1 2 3
4 5 6
7 8 9
3 units
3 units
9 square units in square3” or 3 units on each side3 x 3 = 9
Area of a square
Suppose square was 4 cm on each side. What is the area?
Suppose square was 6 feet on each side. What is the area?
Area of a square
Formula is side times side (S x S) OrSide squared (S2)
Area of a Rectangle3”
4”
1 2 3
3 units
4 units
12 square units in the rectangle3” or 3 units on top (width)4” or 4 units on side (height)3 x 4 = 12
4 5 6
7 8 910 11 12
Area of a Rectangle
Suppose a rectangle had a width (top) 5 cm and height (side) of 3 cm. What is the area?
Suppose a rectangle had a width of 6 feet and a length of 2 feet. What is the area?
Suppose a rectangle had a length of 8” and a width of 8”. What is the area?
Area of a Rectangle
Formula is TOP times SIDE OrLength times Height Or L x H Or L x W
Area of a Parallelogram
What is the relationship between a
rectangle
and a
parallelogram?
Area of a Parallelogram
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