The purpose of this activity is to engage students in evaluating a claim made on the basis of supporting statistics.

Achievement Objectives
GM4-5: Identify classes of two- and three-dimensional shapes by their geometric properties.
GM4-6: Relate three-dimensional models to two-dimensional representations, and vice versa.
Description of Mathematics

The background knowledge and skills that need to be established before and/or during this activity are outlined in the diagram below:

Click to show example questions for each heading

This activity may be carried out with step by step guidance, or by allowing the student to follow their own method of solution. The approach should be chosen in sympathy with students' skills and depth of understanding.


Pyroxenes are minerals found in cooled volcanic lava. They have an interesting geometric structure.


Identify and list the irregular polygons that make up the pyroxene crystal shown in the diagram.


Use this list to construct a net for a pyroxene crystal.


The procedural approach  (show more)

  • The student is able to create a net, with guidance, to build a specified solid.

The conceptual approach  (show more)

  • The student is able to create a net to build a specified solid.

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