1. Surface Area of Prisms and Cylinders
Chapter 8 Section 8

2. Using a Net
What is a net?
A two-dimensional pattern that you can fold to make a three-dimensional figure.
Let’s Look

3. Surface Area
Definition: the sum of the areas of the faces of a shape.

4. Surface Area of a Triangular Prism

5. Surface Area of a Triangular Prism #2
9in
6in
4in
7in

6. Warm-Up 48 ft2 Find the total surface area of this shape 5ft 4ft 3ft

7. Formula for Area of Triangular Prism: SA = wh + lw + lh + ls

8. Formula for Surface Area of Triangular Prism: SA = wh + lw + lh + ls
Find the surface area of a triangular prism with the following dimensions:
w = 10cm
l = 6cm
h = 8cm
s = 5cm

9. Formula for Surface Area of Triangular Prism: SA = wh + lw + lh + ls
Find the surface area of a triangular prism with the following dimensions:
w = 3in
l = 4in
h = 6in
s = 2in

10. Surface Area of a Rectangular Prism

11. Surface Area of a Rectangular Prism # 2
5in
6in
5in

12. Warm-Up
Find the total surface area of this shape 5m 5m 5m

13. Warm-Up 150 m2 Find the total surface area of this shape 5m 5m 5m 25m2

14. Warm-Up
Find the total surface area of this shape
10ft
3ft
5ft

15. Warm-Up 190 ft2 Find the total surface area of this shape 10ft 5ft 3ft

16. Surface Area of a Rectangular Prism = 2(wh + lh + lw)
Find the surface area:
w = 3in
l = 4in
h = 6in

17. Surface Area of a Rectangular Prism = 2(wh + lh + lw)

18. Surface Area of a Cylinder: SA: 2 𝝅 𝒓 𝟐 + 𝝅𝒅𝒉
In other words:
Area of the circle (there are two circles).
Area of rectange  length × width
(height) × (cirumference)

19. Surface Area of Cylinders

20. Surface Area of Cylinders

21. Warm-Up
Find the total surface area of this shape
in2
6in
10in

22. Warm-Up 244.92 in2 Find the total surface area of this shape 10in 6in

23. Surface Area of a Cylinder: SA: 2 𝝅 𝒓 𝟐 + 𝝅𝒅𝒉
Find the surface area of the cylinder:
h = 12in
d = 6in

24. Surface Area of a Cylinder: SA: 2 𝝅 𝒓 𝟐 + 𝝅𝒅𝒉
Find the surface area of the cylinder:
h = 8cm
d = 4cm

25. Quick Check (I’m collecting this!!)
Pg. 445 in book
Numbers 5, 7, 15
NO HOMEWORK! 