Another solution is that right examples can be folded down flat onto one isosceles triangle while left examples cannot.

All examples in this Problem feature four isosceles triangles connected by corners and/or edges.

This was conceived as a false solution for BP898.

This was conceived as a mistaken solution for BP898.

Another way to phrase this solution is that right examples can be folded down flat onto one isosceles triangle while left examples cannot.

All examples in this Problem feature four isosceles triangles connected by corners and/or edges.

Another way to phrase this solution is that left examples can be folded down flat onto one isosceles triangle while right examples cannot.

All examples in this Problem feature four isosceles triangles connected by corners and/or edges.

Molly C Klenzak _, _ Aaron David Fairbanks

Molly C. Klenzak _, _ Aaron David Fairbanks

All examples in this Problem feature four isosceles triangles connected by corners and/or edges.

Wide angles connected to narrow angles vs. not so.

Molly C. Klenzak, Aaron David Fairbanks

Bongard Problems with world shape with one hole vs. other Bongard Problems.

Aaron David Fairbanks