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 Grogg splits an 11-gon into triangles by drawing all the diagonals from one vertex. Miraculously, each of these triangles has area 15. What is the area of the original 11-gon?

 May 27, 2021
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The  number  of  diagonals drawn  =  11  - 3    =  8

 

The  number  of  triangles  formed  =   8 +  1   =   9

 

The  area  of  the 11 - gon     =   9 (15)   = 135

 

 

cool cool cool

 May 27, 2021

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