S=12*3*sin*(1/2)
S=9√3
9√3=12*3*sin*(1/2)
9√3= 36*(1/2)* sin
9√3 = 18*sin
9√3 / 18 = sin
√3/2 = sin
sin 60 = √3/2
Ответ: 60
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S=12*3*sin*(1/2)
S=9√3
9√3=12*3*sin*(1/2)
9√3= 36*(1/2)* sin
9√3 = 18*sin
9√3 / 18 = sin
√3/2 = sin
sin 60 = √3/2
Ответ: 60