The red sash

Two squares and a rectangle. What is area of the rectangle in terms of square sides a and b?

Scroll down for a solution to this problem.


The red area is (b-a)(a2+b2)/b.

Solution by Bannu.


The red sash
It’s red that makes us happy
Red from the volcano that burns
Red for a belt that is attached at the waist
Red sash can be for history
For our land and it’s story
Red is also for prosperity
With other colours they are
Our red life belt
To live every day and help


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