Archemides
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No one person "discovered" maths. And it is still evolving.
The Babylonians and Indians were the first to study the angles and features of special right triangles. This occurred long before Pythagoras and his followers were credited with the discovery.
The first person who had fingers.
Two triangles are considered to be similar if for each angles in one triangle, there is a congruent angle in the other triangle.Two triangles ABC and A'B'C' are similar if the three angles of the first triangle are congruent to the corresponding three angles of the second triangle and the lengths of their corresponding sides are proportional as follows: AB / A'B' = BC / B'C' = CA / C'A'
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