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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.

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You are meant to be together

Sometimes, you find the right person at the wrong time. Sometimes it’s the wrong person at the right time. But when you find the right person, at the right time, in the right situation, it’s because you are meant to be together. Fate has grabbed both of your hands. Don’t let go.

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Harold Stephen Black

Died 11 Dec 1983 at age 85 (born 14 Apr 1898).American electrical engineer who discovered and developed the negative-feedback principle, in which amplification output is fed back into the input, thus producing nearly distortionless and steady amplification. In 1921, Black joined the forerunner of Bell Labs, in New York City, working on elimination of distortion. After six years of persistence, Black conceived his negative feedback amplifier in a flash commuting to work aboard the ferry. Basically, the concept involved feeding systems output back to the input as a method of system control. The principle has found widespread applications in electronics, including industrial, military, and consumer electronics, weaponry, analog computers, and such biomechanical devices as pacemakers.

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