10.05 Story problems with area and perimeter
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Do you remember how to find the perimeter and area of a rectangle? Let's try this problem to practice.
Find the area of the rectangle shown.
 |
width = $8$8 m |
| length = $14$14 m |
$\text{Area }$Area $=$= $\text{length }\times\text{width }$length ×width m2 $\text{Area }$Area $=$= $\editable{}\times\editable{}$× m2 (Fill in the values for the length and width.) $\text{Area }$Area $=$= $\editable{}$ m2 (Complete the multiplication to find the area.)
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To solve problems involving the perimeter and area of rectangles, we will be using these formulas:
- Perimeter of a Rectangle $=$= $2$2$\times$×Length $+$+ $2$2$\times$×Width
- Area of a Rectangle $=$= Length$\times$×Width
This video looks at how we can use the area of a rectangle to solve real life problems.
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Question 1
Tyesha wants to frame her square window with a string of twinkle lights. The window has a side length of $13$13 in.
Find the length of the string of twinkle lights that Tyesha needs.
Question 2
Minh is using sticky notes to cover his window. This uses up a total of $80$80 sticky notes, and Minh counts that there are $10$10 sticky notes along the length of the window.
How many sticky notes did Minh use along the width of the window?
A square is a special type of rectangle that has its length and width equal. This means that we can use the rectangle formulas for perimeter and area for a square as well.