How does one calculate the Mean Geometric Chord in extended Trapezoid Wing? The general formula to calulate MGC of a wing is given for a trapezoid in many books but there isn't an example showing how to calculate it for a wing shaped like the one below. I tried to solve individually for section 1 and section 2 and take the mean between those values but couldnt get the solution. I just want to derive a simple formula in case the wing looks like this.
For the mean geometric chord, calculate wing area divided by span.
For the mean aerodynamic chord you integrate chord squared over span and divide the result by wing area.
$$l_\mu = \frac{\int^{+\frac{b}{2}}_{-\frac{b}{2}}l^2dy}{S}$$