195969

To work this out we took the larger half of the square and rotated it around to the left.
Then we got the second half of the square and fitted it with the first half. We ended up with a right angle triangle.
Next we rotated the larger half the other way and put the other half next to it and realised that we had made a rhombus.
After that we did the same thing with the next squares and came up with a trapezium and a irregular pentagon.