1. Answers to Warm Ups 1) 16 2) 10 3) 9√3 4) 48 5) 6
12-1 Prisms
Answers to Warm Ups
1) 16
2) 10
3) 9√3
4) 48
5) 6

2. Prism
3-dimensional object with 2 bases (they can be any shape) and rectangular sides.
Box
Right
Prisms
Rectangular Prism
Octagonal Prism
Cube
Triangular Prism

3. Oblique Prism
Slanted
Leaning Tower of Pisa

4. Area units2 Before = space inside a 2-dimensional object
Surface Area = area on the outside of 3-dimensional object
Lateral Area = area of sides of object
LA = ph
Total Area = area of sides + area of 2 bases
TA = LA + 2B
Painting the Walls
Wrapping a Present

5. Example Find LA and TA BASE 2 4 LA = pH TA = LA + 2B 6 2 Of base
“H” is height of prism
B=Area of base 4
B = 2(4) = 8
p = 2(4) + 2(2) = 12
TA = (8) = 88
LA = 12(6) = 72

6. Volume units3 Space inside a 3-dimensional shape Example BASE 2 4
V = Bh
Example
Filling a Container
V = BH
B = 2(4) = 8 6
V = 8(6) = 48
Area of base 2 4

7. TOO Find the lateral area and total area of a cube with sides 7.

8. TOO Find the volume of a cube with sides 7. Homework: 343
Page 478 #1-14, 17-19
Remember to separate the base from the prism