The length of the KL would be 15. So, the correct option is C.
What is the secant theorem?
The secant theorem expressed as
KM x LM = SM x NM
WE have given as
KL = x + 15
LM = 6
SN = 11
NM = 7
By applying the secant theorem
KM x LM = SM x NM
( x+ 15 + 6) x 6 = 18 x 7
6x + 126 = 126
6x = 0
x = 0
Thus, KL = x + 15 = 15.
Hence, The length of the KL would be 15. So, the correct option is C.
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