Find the area of the shaded figure
Express result to the accuracy of 2 decimal.Correct answers: 119
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
Gramophone patentedIn 1887, Emile Berliner (1851 - 1929) filed for a patent for his invention of the lateral-cut, flat-disk gramophone on this day. We know it better as the record player. Emile got the patent, but Thomas Edison got the fame (for making it work and making music with his American invention). Berliner's legacy also lives on in his trademark (later adopted by RCA): a picture of a dog listening to "his master's voice" issuing from a gramophone. |