In each of the following cases ABC has ABC = 30 and AB = 10 cm. a.

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In each of the following cases △ABC has ∠ABC = 30° and AB = 10 cm.

a. Calculate the least possible length that AC could be.

b. Given that AC = 12 cm, calculate ∠ACB.

c. Given instead that AC = 7cm, calculate the two possible values of ∠ACB.

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