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What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180