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Are the following statements always true, sometimes true or never true?
How do you know?
Can you find examples or counter-examples for each one?
For the 'sometimes' cards can you explain when they are true? Or rewrite them so that they are always true or never true?
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A hexagon has six equal length sides
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Triangles have a line of symmetry
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Squares have two diagonals that
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Cutting a corner off a square makes a pentagon |
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The base of a pyramid is a square
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A cuboid has two square faces |
What about these more complex statements?
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When you cut off a piece from
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Triangles tessellate
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The number of lines of symmetry
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Quadrilaterals can be cut into two equal triangles |
You could cut out the statement cards and arrange them in this grid. Alternatively, you could use these interactivities to organise your thinking: