-------------------------------- Find area of triangle : -------------------------------- [tex]\text {Area of the triangle = } \frac{1}{2} \times s \times \dfrac{ s\sqrt{3} }{2}} [/tex]
[tex]\text {Area of the triangle = } \dfrac{ s^2\sqrt{3} }{4}} [/tex]
-------------------------------- Find Shaded Region : -------------------------------- [tex]\text {Shaded part of the triangle = } \dfrac{1}{3} \times \dfrac{ s^2\sqrt{3} }{4}} [/tex]
[tex]\text {Shaded part of the triangle = } \dfrac{ s^2\sqrt{3} }{12}} [/tex]