# Voltage Current Resistance Triangle [VIR Triangle]

Voltage-current resistance or VIR triangle is a visual representation of Ohm’s law formulas.

The triangle illustrates the three formulas:

V = IR

I = V/R

R = V / I

Let’s understand these.

**V = IR: Voltage is a product of current and resistance**

**I = V/R: Current is defined as the ratio of voltage to resistance**

**R = V/I: Resistance is defined as the ratio of voltage to current**