triangle is what you call for a three sided polygon.
triangle is what you call for a three sided polygon.
what do you call a three sided polygon?
triangle
on the other hand, the converse of a statement with mutually inclusive terms remains true, given the truth of the original proposition. this is equivalent to saying that the converse of a definition is true. thus, the statement "if i am a triangle, then i am a three-sided polygon" is logically equivalent to "if i am a three-sided polygon, then i am a triangle", because the definition of "triangle" is "three-sided polygon".









































a truth table makes it clear that "s" and the converse of "s" are not logically equivalent unless both terms imply each other:
converse (logic)
in ancient china, values for included 3.1547 (around 1 ad), (100 ad, approximately 3.1623), and (3rd century, approximately 3.1556). around 265 ad, the wei kingdom mathematician liu hui created a polygon-based iterative algorithm and used it with a 3,072-sided polygon to obtain a value of of 3.1416. liu later invented a faster method of calculating and obtained a value of 3.14 with a 96-sided polygon, by taking advantage of the fact that the differences in area of successive polygons form a geometric series with a factor of 4. the chinese mathematician zu chongzhi, around 480 ad, calculated that and suggested the approximations = 3.14159292035... and = 3.142857142857..., which he termed the "milü" ("close ratio") and "yuelü" ("approximate ratio"), respectively, using liu hui's algorithm applied to a 12,288-sided polygon. with a correct value for its seven first decimal digits, this value of remained the most accurate approximation of available for the next 800 years.
pi