Answer:
12cm aka B.
Explanation:
In a 30-60-90 triangle, the hypotenuse is always twice as long as the shorter leg, and the longer leg is √3 times as long as the shorter leg.
Since the length of the shorter leg is 6 cm, the hypotenuse is:
2 times the length of the shorter leg = 2 × 6 cm = 12 cm
Therefore, the length of the hypotenuse of the triangle is 12 cm.
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