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Intermediate

The balance sheet

A unit square and a parallelogram. What’s the area of the latter?

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Solution

The parallelogram area is 1.

Solution by ajnirp.

The area of a parallelogram is base times height: so |AG| * |IC|. Now from comparing angles in right triangles ABG and CIA, they are seen to be similar. Therefore |IC|/|AC|=|AB|/|AG|. This gives |AG| * |IC| = |AB| * |AC| = 1.

Visual solution

Solution by Ben Akkus visualised by David Andriana.

Poem

We live and die
In between
Our heart is beating
Our soul willing
Our brain thinking
We are working
We have friends and values
Living with moral and love
We are dreaming
Believing
Caring
Sharing
And loving
(inspired from Balance sheet of life, author unknown)

Bella

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