2:12
Adding pentagonal numbers in 3D (proof without words)
Mathematical Visual Proofs
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2:09
Sums of Oblong Numbers I (visual proof without words)
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1:21
Galileo's Odd Ratios II (visual proof without words)
Mathematical Visual Proofs
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2:25
Sums of Oblong Numbers III (visual proof without words)
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1:50
A Hexagonal Geometric Sum (visual proof without words)
Mathematical Visual Proofs
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2:19
3D Visual Sum of Odd Squares | proof without words
Mathematical Visual Proofs
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1:39
Cubes from double sums (visual proof without words)
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1:14
4:44
36:51
2:17
7:47
Can You Figure Out the Amazing Formula for nth Pentagonal Numbers?
Math by DS Sir
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3:56
Golden Ratio is Irrational from a Regular Pentagon (visual proof)
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2:27
1:19
Differentiated Geometric Series (proof without words)
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1:38
2:01
Every Cube is an Arithmetic Sum (visual proof without words)
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