two equal circles touch each other at \( T \), if \( Q P=4.5 \mathr...

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two equal circles touch each other at \( T \), if \( Q P=4.5 \mathrm{~cm} \), then \( Q R= \)
(a) \( 9 \mathrm{~cm} \)
(b) \( 18 \mathrm{~cm} \)
(c) \( 15 \mathrm{~cm} \)
(d) \( 13.5 \mathrm{~cm} \)
(W)
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