Find the area of the shaded ...
Find the area of the shaded octagon (A=?, a=1999) and express result to the accuracy of 3 decimal.Correct answers: 22
The first user who solved this task is Allen Wager.
#brainteasers #math #riddles
Edison patentIn 1897, one of the various patents for a "Phonograph" was issued to Thomas Alva Edison (No.575151). It was one of several patents relating to his invention received by the patent office on 3 Dec 1890 that were issued on various dates between 27 Jun 1893 and 30 Sep 1898. |