Moment of inertia question

Three 0.10 kg balls are connected by light rods to form an equilateral triangle with a side length of 0.40m.
What is the moment of inertia of this triangle about an axis perpendicular to its plane and passing through one of the balls? Express answer in kg/m^2

Thanks

I = 2*m*R² = 2*.10*.40² = .032 kg∙m²

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