How Many Triangles are insid...
How Many Triangles are inside me?Correct answers: 123
The first user who solved this task is Maja Inkret.
#brainteasers #math #riddles
World's first rocket-propelled aircraft flightIn 1928, the world's first rocket-propelled aircraft flight was made over the Rhon Mountains, Germany. It was a tailless glider with two solid-fuel rockets, pioneered and developed by Alexander Martin Lippisch. |