Teacher professional development and classroom resources across the curriculum

Teacher professional development and classroom resources across the curriculum

Search
MENU
Learning Math Home
Session 9, Part C: Cross Sections
 
Session 9 Part A Part B Part C Homework
 
Glossary
geometry Site Map
Session 9 Materials:
Notes
Solutions
Video

Session 9, Part C:
Cross Sections

In This Part: Slicing Solids | Polygon Shadows

You've looked at some of the "two-dimensional" properties of three-dimensional figures: their surfaces (nets) and their cross sections. Solid figures also cast two-dimensional shadows. Do you think you can recreate a solid by knowing what shadows it casts?




Take it Further

Problem C5

 Solution

A solid object casts a circular shadow on the floor. When it is lit from the front, it casts a square shadow on the back wall. Try to build the object out of clay. Can you name it?

Problem C6

 Solution

A solid object casts a circular shadow on the floor. When it is lit from the left, it casts a triangular shadow on the back wall. Try to build the object out of clay. Can you name it?

Problem C7

 Solution

Suppose the object casts a circular shadow on the floor, a square shadow when lit from the front, and a triangular shadow when lit from the left. Try to build the object out of clay. Can you name it? Note 4
 

Next > Homework

Learning Math Home | Geometry Home | Glossary | Map | ©

Session 9: Index | Notes | Solutions | Video

Home | Catalog | About Us | Search | Contact Us | Site Map

| Follow The Annenberg Learner on Facebook

© Annenberg Foundation 2013. All rights reserved. Privacy Policy