https://prnt.sc/j35e5m

The area of the base is composed of six congruent  isosceles triangles with sides of 14cm  and an included angle of 60°

So....the area   =

6 (1/2) (14)^2*sin (60)  =

3 * 196 * √3 / 2  =

(3/2) * 196 * √3  =

294√3  cm ^2