- Choice HSince T and U bisect QR and QS, respectively, TU//RS. Thus, $$\angle TUQ=\angle S=60° \\$$ $$ \Rightarrow \angle TUS=180°-\angle TUQ=180°-60°=120°$$
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- Choice HSince T and U bisect QR and QS, respectively, TU//RS. Thus, $$\angle TUQ=\angle S=60° \\$$ $$ \Rightarrow \angle TUS=180°-\angle TUQ=180°-60°=120°$$
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