1. Warm up: Work out the area of these figures.
They are not drawn to scale.
7cm
5cm
10cm2
35cm2
5cm
9cm
36cm2
4cm
10 cm
4cm
8 cm
90cm2
12.5cm

2. 13-2 Surface Area of Prisms
Workbook Please

3. Learn to find the surface area of prisms and cylinders.

4. If you remove the surface from a three- dimensional figure and lay it out flat, the pattern you make is called a net.
Nets allow you to see all the surfaces of a solid at one time. You can use nets to help you find the surface area of a three-dimensional figure Surface area is the sum of the areas of all of the surfaces of a figure expressed in square units.

5. Nets Interactions
Click to play with nets

6. Workbook pg 306 (l)(w) l h (l)(h) (l)(h) (w)(h) (w)(h) (l)(h) (w)(h)

7. 6 in.
4 in.
12 in.
288
288 in squared

8. Practice
p. 308

9. Work out with your partner
2 (180) + (2)216 +(2) 120
2 (50) + (2)20 + (2) 10
= 1032 cm2 squared
= 160 in 2

10. #5 Another way 7 5 7 8 3 8 Area = 7 x 5 Area = 35 How many are there?
Sur Area = =
Area = ½ (8 x 3)
Area = 12
Sur Area = 150 ft 2 3
How many are there?
2!! 2 x 12 = 24 8

11. Surface Area Practice

12. Homework: Workbook pg 309 # 1 – 4