Foursquare originated around the 1940's
A triangle with five sides is a pyramid. There are four sides that originate from each of the four edges of the bottom square, which is the fifth side.
square(answered by a two year old)
Italy
4
Somewhere in California, apparently.
A four-sided polygon with four congruent sides and four equal angles is a square
1850
1873
200BC
In 1924.
1497
30 i think