1. bell ringer 11-2-18 1. What shape is the base of a cube? Sides?
2. What shape is the base of a rectangular prism? Sides?
3. What shape is the base of a triangular prism? Sides?
4. What shape is the base of a cylinder? Sides?
5. What shape is the base of a pyramid? Sides?
6. What shape is the base of a cone?
7. How do you determine surface area?

2. Volume of Solids and Composites
FRIDAY, November 2, 2018

3. volume formulas (make sure they are included in your NOTEBOOK)
Cubes, Prisms, and Cylinders  V= Bh
Cones and Pyramids  V = Bh
Spheres  4 3 𝜋𝑟3

4. (Make sure these are in your Notebook)
But what’s the “B”???
(Use an “A”.)
The formula you use for the “B” (area of the base) depends on which figure is your base.
(Make sure these are in your Notebook)
Circle  A = 𝜋𝑟2
Parallelogram  A = bh
Square  A = s2
Triangle  bh
Rectangle  A = lw
Trapezoid  A = (b1 + b2)h

5. Examples (Include in notebook)

6. More examples
If a fish tank holds 756in3 of water and has a length of 1 ft and a depth of 7in, how tall is it?
A cone cup for a water dispenser has a height of 10cm. If it holds 𝜋cm3, what is the diameter?
A Toblerone chocolate wrapper is 8in long. The base is an equilateral triangle with a side length of 1in. How much chocolate could fit inside if the bar was solid instead of little pyramids?

7. What’s a composite solid?
A composite solid is made up of two or more solids .

8. Examples
If combined, find the volume of each piece and add them together.
If it’s a solid with another solid removed, subtract the volume.
Examples to include in your Notebook

9. More examples
A tennis ball can has 3 tennis balls inside. The radius of a tennis ball is 2.7in.
1. What is the volume of air in the can?
An ice cream cone is 6in tall. The ice cream scoop has a diameter of 3in.
2. What is the total volume?
3. What is the volume of the air inside the cone?

10. classwork - if it asks for surface area, only find the volume.
Geometry Textbook:
p. 733 #44
p. 756 #23-27
p. 734 #48-49
p. 763 #27-29
p. 739 #32-34
p. 778 #6
p. 748 #34-37
p. 779 #13
Homework – Volume of composites

11. exit ticket 1. What is a composite solid?
2. When dealing with composites, when do you add and when do you subtract?