Answer
$Reactance=127.28Ω\approx127Ω$
Work Step by Step
The reactance of the circuit can be calculated as one of the sides of the right triangle by using the Pythagorean Theorem.
$Impedance^{2}=Resistance^{2}+Reactance^{2}$
$Reactance=\sqrt {Impedance^{2}-Resistance^{2}}$
$Reactance=\sqrt {(165Ω)^{2}-(105Ω)^{2}}=127.28Ω\approx127Ω$
