PQ and RS are two common tangents to circles which touch each other at a point \( \mathrm{R} \).... VIDEO
PQ and RS are two common tangents to circles which touch each other at a point \( \mathrm{R} \). such that \( \mathrm{RS}=4 \mathrm{~cm} \), then PQ is
a. \( 8 \mathrm{~cm} \)
b. \( 12 \mathrm{~cm} \)
c. \( 3 \mathrm{~cm} \)
d. \( 2 \mathrm{~cm} \)
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