Making triangle patterns
In this task you use straws to build a pattern, make a prediction about how many straws you need for more patterns and write an explanation.
Y / N |
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a) |
Your teacher will give you 3 straws. Use these straws to make a triangle. |
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b) |
Your teacher will give you 2 more straws. Add these 2 straws onto the triangle you have made so there are 2 triangles touching side by side. |
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c) |
Your teacher will give you 2 more straws. Now add these 2 straws onto what you have already made to make 3 triangles touching side by side. |
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d) |
How many straws did you use altogether to make 3 triangles? __________ |
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e) |
How many straws would you need altogether to make 4 triangles? __________ |
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f) |
How many straws would you need altogether to make 5 triangles? __________ |
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g) |
i) ii) |
How many straws would you need altogether to make 10 triangles? __________ How did you work this out? |