Sewanhaka High School
Math 8
Per:______________
Name:___________________________________
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Date:________________________
H.W. #66: Ditto
DO-NOW #66: Answer the following questions. Show work.
1) Find the 2) From –e2 – 7e – 8,
volume of
subtract –5e2 + 4e - 5
the pyramid
located at
the left.
Round your
answer to
the nearest
tenth.
Topic: Geometry
Main Idea: Finding the Volume of Spheres
Aim:
RECALL
Lists some comparisons of the cone and sphere.
If you know how to find the volume of a cone, then how
would you find the volume of a sphere?
Formula wise, how would the height of the cone relate to
the sphere?
With the previous conclusion that you came up with, now tell
me as to how I could find the formula for the volume of a
sphere.
A volleyball has a diameter of 10 inches. A pump can
inflate the ball at a rate of 325 cubic inches per minute.
How long will it take to inflate the ball? Round to the
nearest tenth.
NOTES
Find the volume of:
3)
Drill: Answer the following questions. Show work.
1) Let's find the volume of this large
sphere, with a radius of 13 feet. Notice
that the radius is the only dimension we
need in order to calculate the volume of a
sphere.
2) What is the volume of a sphere with a
radius of 6.5 ft?
3) What would happen to the volume of a sphere if the radius was doubled?
Summary:
If time: Find the volume of the following spheres:
1) Radius = 4.5 cm
2) Diameter = 12 mm