For the first proof:
Statement 1: \( \angle S T A \cong \angle S A T, \overline{T R}>\overline{A R} \)
Reason 1: Given
Statement 2: \( \triangle S T A \) is an isosceles triangle
Reason 2: Converse of Isosceles Triangle Theorem
Statement 3: \( m \angle T S R > m
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