Respuesta :

Answer:

4.81 m

Step-by-step explanation:

area of Equilateral triangle with side length a : area = (√3/4) a²

10 = (√3/4) a²

a² = 40√3 / 3 = 23.09

a = 4.81 m

if you are in Trigonometry: h/a = sin 60°

h = (√3 / 2) a

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