Wolfram Demonstrations Project

Calculate the colored area with the given dimensions.

The shaded area consists of three pieces:

The first piece is the colored area between two equilateral triangles, with thickness

; the length of the side of the outer triangle is

The second piece is a parallelogram with width equal to

and height equal to

The third piece is a rectangle with width equal to

and height equal to

. It has the same area as the parallelogram.

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