The diagonal of the square has been divided into three sections of length 4. What’s the total shaded area?pic.twitter.com/s1IMQp3aPZ
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Mr Reeskamp has ingeniously observed that the square decomposes into 24 triangles of equal area. Since it is clear that the area of the square itself is one-half of (4 + 4 + 4)^2, and since the shaded area consists of 7 of these elementary triangles, his conclusion follows.
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