正三角形計算機

Given a side find the perimeter, semiperimeter, area and altitude.Given the perimeter find the side, semiperimeter, area and altitude.Given the semiperimeter find the side, perimeter, area, and altitude.Given the area find the side, perimeter, semiperimeter, and altitude.Given the altitude find the side, perimeter, semiperimeter, and area.

a =
P =	0
s =	0
K =	0
h =	0

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