જો $\Delta ABC$ ના શિરોબિંદુઓ $A(x_{1}, y_{1})$,$B(x_{2}, y_{2})$ અને $C(x_{3}, y_{3})$ હોય,તો $\Delta ABC$ નું મધ્યકેન્દ્ર ........ છે.

• A
  $\left(\frac{x_{1}+x_{2}+x_{3}}{3}, \frac{y_{1}+y_{2}+y_{3}}{3}\right)$
• B
  $\left(\frac{\lambda x_{2}+x_{1}}{\lambda+1}, \frac{\lambda y_{2}+y_{1}}{\lambda+1}\right)$
• C
  $\left(\frac{x_{1}(y_{2}-y_{3})}{2}, \frac{y_{1}(x_{2}-x_{3})}{2}\right)$
• D
  $\left(\frac{x_{1}+y_{2}+y_{3}}{2}, \frac{y_{1}+x_{2}+x_{3}}{2}\right)$