One can make a square, with 4 sticks(of equal length). Then, can you make a 2D figure, that will consist of 12 sticks( of equal length) with an area, equal to the area of 4-such squares.

Dear Sundeep,

ust use 3 of those matches or sticks to arrange into a number '' 4 '' and use the 3 left to arrange into an equilateral triangle. Put them next to each other and you''ll have ''''4 equilateral triangles'''' from 6 equal length sticks or matches

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