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PLEASE HELP! i need a solution AND a proof that shows its true!!

The first picture below consists of 60 small triangles and the other one of 2 same small triangles. What is the biggest amoun
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Answer #1

Lets try to fit the small picture into the large picture as they do not overlap.

Therefore, there will be 1 in the first row, 2 in the second row, 3 in the third row ......... 7 in the last row.

So, total=1+2+3+.....+7=28 copies

But there is hole in the large picture and to this hole in the middle exactly 3 copies will be absent.

Thus, number of copies left=28-3=25 copies.

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