1. Area & Perimeter Review

2. Name the formulas……go!! Shape Name Perimeter Formula Area Formula
Rectangle
𝑝=2𝑙+2𝑤
𝑎=𝑙 ∙𝑤
Square
𝑝=𝑠+𝑠+𝑠+𝑠
𝑎= 𝑠 2
Parallelogram
𝑝=2(𝑎+𝑏)
𝑎=𝑏∙ℎ
Rhombus
𝑝=4𝑎
𝑎= 𝑝𝑞 2
Triangle
𝑝=𝑎+𝑏+𝑐
𝑎= 𝑏∙ℎ 2
Trapezoid
𝑝=𝑎+𝑏+𝑐+𝑑
𝑎= 𝑏 1 + 𝑏 2 ∙ℎ 2
Circle
𝑐=2𝜋𝑟
𝑐=𝜋𝑑
𝑎=𝜋 𝑟 2

3. #1 A right triangle has a height of 5cm and a base that measures 4cm
#1 A right triangle has a height of 5cm and a base that measures 4cm.  What is the area in square centimeters?
10𝑐𝑚 2

4. #2 Mary plans to cover the entire flower garden in mulch the area of the garden is ft squared.  Each bag of mulch will cover 15 square feet, and costs $3.99 for each bag. Without tax, how much should Mary plan on spending to purchase enough mulch to fully cover the enclosed area of the flower garden?

5. #3
12cm
25 cm
Find the approximate area of the figure above… use 3.14 as pi and round to the nearest hundredth.

6. #4
Find the perimeter of the figure below (x=4):
2x+8-x
3(x-3) 4x

7. #5
Jose is planning to build a garden in his new backyard with a round fountain. It has a base of 13ft and a width of 9ft (garden). The diameter of the fountain is the same as the width of the garden. What is the area of the garden.

8. #6
A trapezoid has two bases consisting of 3ft and 7ft. If the height is 5ft what is the area of the figure.

9. #7
8in
11in
9in
Calculate the perimeter of the figure above.

10. #8
The liquid outer core of Earth is 2,300 kilometers thick.  A scale model of the layers of Earth has a scale of 1in : 500km. How thick is the liquid outer core of the model?
        A)  0.2 in               B)  4.6 in     
     C) 0.2 km              D)  4.6 km

11. #9 Graph the following points (1,2), (1,5), (4,5), (4,2), (1,2).
What is the area of the figure.

12. #10
On a map with a scale of 1inch = 9miles, the distance between two towns is 3 inches. What is the actual distance between the two towns?
   A)  3 in   B) 3 mi     C) 27 in      D)   27 mi