3)
We need 11 sticks to form 2 rectangles that are joined together.
4)
1T = 6S
2T = 11S
3T = 16S
4T = 21S
5T = 26S
6T = 31S
7T = 36S
8T = 41S
9T = 46S
10T = 51S
Note ; T = Triangle(s)
S = Stick(s)
5)
1. 1x5+1 = 6
2. 2x5+1 = 11
3. 3x5+1 = 16
4. 4x5+1 = 21
5. 5x5+1 = 26
6. 6x5+1 = 31
7. 7x5+1 = 36
8. 8x5+1 = 41
9. 9x5+1 = 46
10. n x 5+1 = 5n+1
6)
The formula is 5n+1
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