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Let's Investigate Triangles

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

Number Round Up

Stage: 1 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

What will you try first?
Why did you put that number there?
Tell me about how you found that solution.
Is there only one solution?

Tell me about this approach.  What do you think s/he was doing?
How do you think this will help to solve the problem?
What do you think s/he would have done next?