According to the properties of a right-angled triangle, a leg lies opposite an angle of 30 °, which is half the hypotenuse.
Opposite the angle of 30 ° lies CB, which is 3 cm, then the hypotenuse is AB = 6 cm.
If one angle in a right triangle = 30 °, then the other = 60 °.
Opposite the angle of 60 ° lies the leg = AB * √3 / 2, then AC = 3√3.
Answer: AC = 3√3 cm.
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