1) Let's begin by solving for the measures of the minor triangle

2) Let's use the Law of Sines to find CD, let's convert the measurements into decimal ones to better work:
![\begin{gathered} 60^(\circ)06^(\prime)09^(\prime)^(\prime)=60°+06^(\prime)/60+09]()

Let's find the angle D with the Triangle Sum Theorem:

3) Looking back at the graph, we can find BC by finding the angle opposite to this side:

Triangle sum theorem to help us find the angle opposite to BC:
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