Find the area of the shaded region
[2944] Find the area of the shaded region - Find the area of the shaded region accurate up to 3 decimal places. (A=?, r=1389) - #brainteasers #math #riddles - Correct Answers: 39 - The first user who solved this task is Dejan Mratinkovic
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Find the area of the shaded region

Find the area of the shaded region accurate up to 3 decimal places. (A=?, r=1389)
Correct answers: 39
The first user who solved this task is Dejan Mratinkovic.
#brainteasers #math #riddles
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One day, a blonde went to the...

One day, a blonde went to the doctor with both sides of her face burned. The doctor asked, "What happened?" The blonde said, "Well, I was ironing my husband's shirt until the phone rang. I picked it up and half my face was burnt!" The doctor replied, "What about the other half?" The blonde answered, "They called back."
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Edison patent

In 1876, Thomas A. Edison was issued three patents for "Duplex Telegraphs" (U.S. No. 178,221; -3). These were for "an Improvement in Duplex Telegraphs" which enable a transmitted signal be sent on the same wire that could be receiving a signal. In patent 178,222, Edison describes "A balanced battery is used for transmitting when the balance is disturbed. An electromagnet is used, through which both the received and transmitted pulsations pass, and the connections are made so that the action of the current sent is balanced, while that coming from the distant station is operative, to work a balanced relay and local circuit or sounder."
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