​I can apply area and perimeter formulas for rectilinear shapes in real world and mathematical problems.

Area

• Area is the number of square units that covers the inside of a shape.

• We can use the formula length times width (L x W) to find the area of a rectangle.

A square's area formula is side times side.

A = s x s

How can I find the missing side if the perimeter or area is given?

• Read the problem carefully

• Write down the information that is given.

• Use your knowledge of how to find the area and perimeter to help you solve for the missing side.

The perimeter of a shape is 36 cm. The width is 8cm. What is the length?

What do you know about a rectangle? How does that information help you solve the problem?

Place what we know in the formula.