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4√3 = a²√3 / 4 // ×4
16√3 = a²√3
16 = a²
a = √16
a = 4
Obw = 3a = 3×4 = 12 (j)
P = a×h / 2
4√3 = 4h / 2 // ×2
8√3 = 4h // ÷ 4
h = 2√3 (j)