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Mathematics
Problem
In the standard proof that the lengths of two tangents drawn from an external point to a circle are equal, which triangle congruence criterion is used? a)
SSS
\text{SSS}
SSS
b)
SAS
\text{SAS}
SAS
c)
RHS
\text{RHS}
RHS
d)
ASA
\text{ASA}
ASA
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