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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?
Age 5 to 7
Challenge Level
Marienka from Kosice,
Slovakia sent in the answers for the dominoes to finish the
patterns.
0 0 0 0 : 0 0
1 2 3 4 : 5 66 5 4 3 : 2 1
6 5 4 3 : 2 16 5 4 3 : 2 1
5 4 3 2 : 1 0
Bora from Irmak Primary School, Turkey used some excellent words to describe the patterns.
1st row: 5 and 6, because they are in decreasing order.
2nd row: 2-2 and 1-1, again in decreasing order, this time in doubles.
3rd row: 2-1 and 1-0, again in decreasing order, but both parts are full, upper part goes from 6 to 1, lower from 5 to 0.
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.