9. Area and perimeter
9.02 Other problems with perimeter
Lesson
Are you ready?
Do you remember how to find the perimeter of a rectangle? Let's try this problem to practice.
Find the perimeter of the rectangle shown.
Learn
In this video, we deconstruct and reconstruct a rectangle. If we know the perimeter and one of the side lengths we can work out the other.
Apply
question 1
Find the missing side length of the rectangle shown.
Learn
If we know the perimeter of a square, we can find the side length by dividing the perimeter by $4$4. This works because a square has $4$4 equal sides.
Apply
Question 2
Find the side length of the square shown.
Remember!
We can find the perimeters of rectangles and squares by either using a formula or finding the sum of their side lengths.