Pick up a fin geometry and analyze it based on 1-D approach and 2-D approach. Use same parameters for both approaches (dimensions, coefficients, conductivity, temperatures and boundary conditions. Use a base 5-times thicker than the fin's and set its free surface away from fin to a fixed temperature. The unfinned length is 10 times as the fin thickness from above and below. Base Free surface Compare the rate of heat between the two approaches considering heat from finned and unfinned surfaces. Show the cutoff dimension that determines the significance of considering 2-D instead of using 1-D approximation.