Proposed by Mehmet Sahin-Ankara-Turkey
https://www.cut-the-knot.org/triangle/Angle135.shtml
Solution by Daniel Sitaru-Romania
Published by Alexander Bogomolny-USA
Proposed by Mehmet Sahin-Ankara-Turkey
https://www.cut-the-knot.org/triangle/Angle135.shtml
Solution by Daniel Sitaru-Romania
Published by Alexander Bogomolny-USA