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Nelson Education > School > Mathematics K-8 > Mathematics 4 > Parent Centre > Surf for More Math > Chapter 11 Lesson 5

Lesson 5 - Communicate an Understanding of Geometric Concepts

To encourage your child to have fun on the Web while learning about Communicate an Understanding of Geometric Concepts, here are some games and interactive activities they can do on their own or in pairs.



Use mathematical language to show what you know about a 3-D shape.

Builds Upon

Student Book pages 302-303

Instructions for Use


Tetrahedron lets your child build a tetrahedron.

To use Tetrahedron, click on the 'Cut outs, net' link. Set the pull-down menu to tetrahedron. Move the slider slowly from 0 to 100. Click on the object and drag the left mouse button to rotate it.  


An Impossible Object helps your child think about different 3-D shapes.

To use An Impossible Object, click on the object and drag the left mousebutton to rotate it.   Have your child try to reproduce the object.