Mohon di bantuu yahh

DC = 3√3
Sudut BDC = 180 - Sudut BDA = 180 - 60 = 120
Sudut DBC = 180 - (Sudut BDC + Sudut DCB) = 180 - (120 + 30) = 180 - 150 = 30

Aturan sinus
DC / sin DBC = BD / sin DCB
3√3 / sin 30 = BD/ sin 30
3√3 / 1/2 = BD / 1/2
1/2 BD = 3/2 √3
BD = 3√3

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