When trying to determine the measure of m_ACB, what is the justification for your work? B. 56° 4 ©​

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

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The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?