Three triangles, one of which is right and one is isosceles, form a large triangle. Two side lengths are given. What fraction of the total area is red?

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## Solution

A fraction of 4/15 is red.

## Poem

The isosceles trio

Who’s doing it right

They are having a good time

Until the sun will shine

They are torned

By angles

And by sides

They close their right angles

The trio makes the law

They want to put things in order

All three living on the border

A mess, a big unorder