Kirchhoff's laws (two h's in Kirchhoff) are relationships that hold, in the quasi-static limit, between voltages and currents in a circuit, regardless of the nature of the elements in the circuit. Whether you have a circuit composed of resistors, capacitors and transistors, and one composed of potatoes, carrots and bananas, Kirchhoff's laws hold.

Ohm's law is a so-called constitutive equation, that is, a relation that specifies the behaviour of a certain circuit element, the two-terminal linear resistor. From the point of view of circuit theory, Ohm's law actually defines the linear resistor: it is that element for which the voltage across its terminals is directly proportional to the current crossing the element, and the coefficient of proportionality is called resistance.

Therefore, you "deduce" or, rather, you directly calculate, determine or measure the resistance by employing its very definition, as you would do for any other quantity.

Kirchhoff's laws (two h's in Kirchhoff) are relationships that hold, in the quasi-static limit, between voltages and currents in a circuit, regardless of the nature of the elements in the circuit. Whether you have a circuit composed of resistors, capacitors and transistors, and one composed of potatoes, carrots and bananas, Kirchhoff's laws hold.

Ohm's law is a so-called constitutive equation, that is, a relation that specifies the behaviour of a certain circuit element; in this case, the two-terminal linear resistor. From the point of view of circuit theory, Ohm's law actually defines the linear resistor: it is that element for which the voltage across its terminals is directly proportional to the current crossing the element, and the coefficient of proportionality is called resistance.

Therefore, you "deduce" or, rather, you directly calculate, determine or measure the resistance by employing its very definition, as you would do for any other quantity.