IIT JEE , AIEEE Forum - Mathematics , Algebra

prathima

we can divide the dodecagon into 12 congruent triangles
the base becomes 1/3rd of the side of hexagon
and we get the side as 1unit
so base is 1/3
the angles of the triangle r 30 , 75 , 75
we can find the height as 2 +root 3 / 6
area 1/2 ab
1/2 x 1/3 x 2 + root3 / 6
as there r 12 such triangles the total area is
12 x 1/2 x 1/3 x 2+ root3 / 6 = 2 + root 3 / 6
plz corrct me if i m wrong
i m not sure abt my answer

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