Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

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Teacher's Lab
Shape and Space in Geometry
IntroductionAbout ShapeAbout Space

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In this activity you measure the sides and diagonals of squares, using the ruler supplied on screen.

To use the ruler, measure it on the screen with a string or the edge of a sheet of paper.

For example, this rectangle is about 3.3 units long. Measure it yourself to see if you agree. If you got 4.3 units, you may have lined up at 1 instead of at the edge of the ruler.

Once you have measured the rectangle and gotten an answer close to ours, you are ready to move on.



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