Question

who invented quadrilateral
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Answer 1

Answer:

Quadrilaterals were invented by the Ancient Greeks. It is said that Pythagoras was the first to draw one. In those days quadrilaterals had three sides and their properties were only dimly understood.

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Answer 2

Quadrilateral was invented by Brahmagupta.

• Brahmagupta (ad 628) was the very first mathematician who provided the formula for the area of a cyclic quadrilateral.

• The contributions of Brahmagupta to geometry are very considerable.

• Brahmagupta is the first person who discussed the method for finding a cyclic quadrilateral with rational sides.

• The celebrated theorems of Brahmagupta on the circum-diameter of a triangle and on procuring the diagonals of a cyclic quadrilateral are now notable.

• The word quadrilateral originated from the two Latin words Quadri which means a variant of four, and latus which means "side".

• Quadrilaterals can be either complex which is also known as crossed (self-intersecting), or simple (not self-intersecting). Simple quadrilaterals can be either convex or concave.

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