http://www.flickr.com/photos/goddess-arts/2886293009/
- The conical water cup has dimensions 6[U+0080][U+009D]with a 3. 5 [U+0080][U+009D]diameter. How much
can it hold? 57.73 in^3
http://www.flickr.com/photos/63965847@N00/27208445/
Cones
Pacing:This lesson should take one to two class periods
Goal:This lesson introduces students to the surface area and volume formulas of spheres.
Geography Connection!Using a globe, show students how a sphere is formed using rotation. The teardrop shaped
pieces are calledgores. Once placed together and folded so they meet at the top and bottom (poles), a sphere is
formed.
Thegreat circleis a cross section of a sphere cutting through the widest part of the sphere, the equator. Any other
cross section is called asmall circle.Using the globe, show students examples of each (i.e. The Artic Circle and the
Equator).
Extra research!Have students research the different types of maps and list the pros and cons of each, relating to the
true topography of Earth.
Additional Examples:
a. How much leather is needed to make a baseball with a 6. 5 [U+0080][U+009D]diameter? 132.72 in^2
b. A plant container is a hemisphere with a radius of 17.[U+0080][U+009D]How much dirt can it hold?Don’t
forget to divide your answer in half – 1286 .22 in^3Chapter 1. Geometry TE - Teaching Tips