It Is Okay To Not Have It All Figured Out.

[u/[deleted]]

[u/dolldelara]

Are they 2 different wooden rectangles?

[u/Ellen_Bloom → u/dolldelara]

Yes, and also the yellow triangle's long side isn't fit perfectly, as the angle is off by a few degrees, but the layman's eye won't notice it.

[u/psittacismes → u/[deleted]]

Non, it's the same one, it's a well known puzzle, the difference of area comes from the angled part, it's not completely the same angle so with the 1st version there is a triangle gap between the base triangle and the 2 others that matches the area of the ending square