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Anonymous
 No.16974159
File: GcgTJ5.gif (1.13 MB, 320x180)
1.13 MB GIF
 No.16974159
Tn=n(n+1)/2
T60=60×61/2=30×61=1830
The sum of the first 60 integers also equals 1830, which, as shown, is the 60th triangular number. A triangular number represents the total amount of dots that can form an equilateral triangle. By definition, each angle of this triangle is 60°
>>
Anonymous
 No.16974208
 No.16974208
>>16974159
every triangular number is the sum of the first n integers
>>
Anonymous
 No.16974213
 No.16974213
Wait 'till this nigga sees the formula for the sum of consecutive natural numbers.
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