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Square numbers shown formed from consecutive triangular numbers

polygonal numbers

Figure 1: Polygonal arrays.

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Srinivasa Ramanujan, Indian mathematician and autodidact.

6 Interesting Facts about Srinivasa Ramanujan

Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro

Why Is Christmas in December?

Saint Lucia Day. Young girl wears Lucia crown (tinsel halo) with candles. Holds Saint Lucia Day currant laced saffron buns (lussekatter or Lucia's cats). Observed December 13 honor virgin martyr Santa Lucia (St. Lucy). Luciadagen, Christmas, Sweden

7 Winter Solstice Celebrations From Around the World

World Data Locator Map: Australia

Is Australia an Island?

Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland

The Largest Islands in the World

The Prado Museum facade at the Diego Velaszquez memorial. Established in 1819, the museum is considered the best collection of Spanish art and one of the world's finest collections of European art. Madrid, Spain

20 Paintings You Have to Visit at the Museo del Prado in Madrid

The Battle of Gettysburg, July 1-3, 1863. (Civil War, Pennsylvania)

9 Worst Generals in History

square number: Media

mathematics

Images

Square numbers shown formed from consecutive triangular numbers

Square numbers shown formed from consecutive triangular numbers

Figure 1: Square numbers shown formed from consecutive triangular numbers.

Encyclopædia Britannica, Inc.

polygonal numbers

polygonal numbers

The ancient Greeks generally thought of numbers in concrete terms, particularly as...

Encyclopædia Britannica, Inc.

Figure 1: Polygonal arrays.

Figure 1: Polygonal arrays.

Encyclopædia Britannica, Inc.