PMN and PQR are two secants of the circle MQTRN and PT is...
PMN and PQR are two secants of the circle MQTRN and PT is a tangent. If PM = 5cm, PN = 12cm and PQ = 4.8cm, calculate the respective lengths of PR and PT in centimeters
7.3, 5.9
7.7, 12.5
12.5, 7.7
5.9, 7.3
Correct answer is C
PQPN=PMPR=QMNR
4.812=5PR
PR = 5×124.8=504
= 12.5
PQPN=PMPT=TMNT
PT12=5PR
PT2 = 60
PT = √60
= 7.746
= 7.7
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