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Earn +20 ptsQ: How do you find out how many diagonals a shape has?
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How many diagonals are there in a 25 sided shape?
There are 275 diagonals in a shape with 25 sides. The formula is n*(n-3)/2
How many diagonals does a 100 sided shape have?
1/2*(1002-300) = 4850 diagonals
How many diagonals are there in a 18 sided shape?
Number of diagonals = 18*(18-3)/2 = 135
How many diagonals does a 12 sided shape have?
12*(12-3)/2 = 54
What shape has 35 diagonals?
octagon
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