Look at this pattern of triangles made with matchsticks and complete the table given below.
How many matchsticks do you think are needed to make
a 6 triangles? 1 matchsticks b 7 triangles? 19 matchst
c 10 triangles? 21 matchsticks d 20 triangles? 41 match
e x triangles?
Write down the generalised statement for x triangles.
Number of triangles
1
3
4
5
Number of matchsticks?
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Answer:
9+11+13+3
36 match sticks needed in total
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