1. Please complete warm up and write down the Homework 
Tuesday, February 21st
Please complete warm up and write down the Homework 
Warm Up
Solve the Proportion
2. Find the Surface Area
5 in.
4 in.
3 in.

2. What candy is never on time? Choco-late
Joke of the Day
What candy is never on time? Choco-late

3. Interims are only 2 weeks away!!!!!!!!!!
Weekly Review Answers
Interims are only 2 weeks away!!!!!!!!!!

4. Volume and Surface Area
Goal for today
Volume and Surface Area
Triangular
AND
Rectangular
PRISMS

5. Surface Area

6. How would you describe:
Net
Volume
And
Surface Area

7. Using a Net Using a Formula
Part 1: Surface Area
Using a Net
Using a Formula

8. Nets
Find the area to each shape in the net. Add the areas up to find the TOTAL AREA
Draw a net to help you see each face of the prism.
Use the formula A = lw to find the area of each face.

9. Finding the Areas of each!
A: A = 5  2 = 10
B: A = 12  5 = 60
C: A = 12  2 = 24
D: A = 12  5 = 60
E: A = 12  2 = 24
F: A = 5  2 = 10
Add the areas of each face.
S = = 188
The surface area is 188 in2.

10. You Try #1
Rectangle

11. Remember!
Area of a TRIANGLE is
½ x b x h

12. You Try #2 Triangular Prism
12 in
5 in
4 in

13. You Try #3 Triangular Prism
3 in
7 in
11 in

14. Surface Area with Formulas

16. #1 Try Together! SA= 2(lw)+2(wh)+2(lh)
SA=_____________+_____________+___________
SA=_________

17. #2 You Try! SA= 2(lw)+2(wh)+2(lh)
SA=_____________+_____________+___________
SA=_________

18. Part 2: Volume

19. To find the volume of any prism, you can use the formula V= Bh,where B is the area of the base, and h is the prism’s height.
The base of a RECTANGULAR prism is a rectangle so the base is: l x w
To find the volume of a triangular prism, B is the area of the triangular base so the base is:
½ x b x h

20. #1 You Try! A=bh B= l x w 16 in. 12 in. 29 in. V = lwh
Write the formula.
V = 29 • 12 • 16
l = 29; w = 12; h = 16
V = 5,568 in3
Multiply.

21. A rectangular prism with base length 6 ft, width 5 ft, and height 7 ft
#2 You Try!
A=bh
B= l x w
A rectangular prism with base length 6 ft, width 5 ft, and height 7 ft

22. #3 Try Together! A=bh B= ½ x b x h V = Bh Write the formula.1 2 __
B = • 3.9 • 1.3; h = 4. 1 2 __
V = m3
Multiply.

23. The bases of a prism are always two congruent, parallel polygons.
Caution!

24. #4 You Try A=bh B= ½ x b x h V = Bh Write the formula.1 2 __
B = • 6.5 • 7; h = 6. 1 2 __
V = ft 3
Multiply.

25. #5 You Try A=bh B= ½ x b x h 9 ft 5 ft 4.5 ft V = Bh
Write the formula.
V = ( • 4.5 • 9) • 5 1 2 __
B = • 4.5 • 9; h = 5. 1 2 __
V = ft3
Multiply.