1. Unit 6: Perimeter and Area
Final Exam Review

2. Topics to cover
Perimeter
Circumference
Area
Surface Area

3. Perimeter Perimeter – SUM of all sides of a POLYGON
TRIANGLE– ADD up all 3 sides
RECTANGLE– 2 pairs of EQUAL sides
SQUARE– all 4 sides are EQUAL

4. Perimeter
You Try!

5. Circumference
Circumference – The distance around the edge of a CIRCLE.
Formula: 𝑪= 𝝅∙𝒅
𝒅=𝒅𝒊𝒂𝒎𝒆𝒕𝒆𝒓
Example
C = 𝝅 ∙𝟏𝟖
𝑨𝒏𝒔𝒘𝒆𝒓: 𝑪=𝟓𝟔.𝟓𝒊𝒏

6. Circumference
You Try

7. Area Area – the space INSIDE of a 2D shape. Formulas
Triangle: 𝐴= 𝑏 ∙ℎ Rectangle: 𝐴=𝑏∙ℎ
Square: 𝐴= 𝑠 Circle: 𝐴= 𝜋 ∙ 𝑟 2

8. Area
Formulas
Triangle: 𝐴= 𝑏 ∙ℎ Rectangle: 𝐴=𝑏∙ℎ
Square: 𝐴= 𝑠 Circle: 𝐴= 𝜋 ∙ 𝑟 2
You try!

9. Surface Area
Surface Area: The SUM of the area of each SURFACE in a 3D shape
Formulas
Cube: 𝑆𝐴= 6 𝑠 2
Rectangular Prism: 𝑆𝐴=2𝑙𝑤+2𝑙ℎ+2𝑤ℎ
Triangular Prism: 𝑆𝐴=𝑏ℎ+𝑏𝑤+𝑤ℎ+𝑤𝑙
Cone: 𝑆𝐴= 𝜋 𝑟 2 + 𝜋𝑟𝑙
Cylinder: 𝑆𝐴=2𝜋 𝑟 2 + 𝜋𝑑ℎ
Sphere: 𝑆𝐴=4 𝜋𝑟 2

10. Surface Area You Try! 1. 2. Formulas Cube: 𝑆𝐴= 6 𝑠 2
Rectangular Prism: 𝑆𝐴=2𝑙𝑤+2𝑙ℎ+2𝑤ℎ
Triangular Prism: 𝑆𝐴=𝑏ℎ+𝑏𝑤+𝑤ℎ+𝑤𝑙
Cone: 𝑆𝐴= 𝜋 𝑟 2 + 𝜋𝑟𝑙
Cylinder: 𝑆𝐴=2𝜋 𝑟 2 + 𝜋𝑑ℎ
Sphere: 𝑆𝐴=4 𝜋𝑟 2
Surface Area
You Try! 1. 2.

11. Surface Area You Try! 3. 4. Formulas Cube: 𝑆𝐴= 6 𝑠 2
Rectangular Prism: 𝑆𝐴=2𝑙𝑤+2𝑙ℎ+2𝑤ℎ
Triangular Prism: 𝑆𝐴=𝑏ℎ+𝑏𝑤+𝑤ℎ+𝑤𝑙
Cone: 𝑆𝐴= 𝜋 𝑟 2 + 𝜋𝑟𝑙
Cylinder: 𝑆𝐴=2𝜋 𝑟 2 + 𝜋𝑑ℎ
Sphere: 𝑆𝐴=4 𝜋𝑟 2
Surface Area
You Try! 3. 4.

12. Surface Area You Try! 1. 2. Formulas Cube: 𝑆𝐴= 6 𝑠 2
Rectangular Prism: 𝑆𝐴=2𝑙𝑤+2𝑙ℎ+2𝑤ℎ
Triangular Prism: 𝑆𝐴=𝑏ℎ+𝑏𝑤+𝑤ℎ+𝑤𝑙
Cone: 𝑆𝐴= 𝜋 𝑟 2 + 𝜋𝑟𝑙
Cylinder: 𝑆𝐴=2𝜋 𝑟 2 + 𝜋𝑑ℎ
Sphere: 𝑆𝐴=4 𝜋𝑟 2
Surface Area
You Try! 1. 2.

13. ALL DONE