Find the area of the shaded ...
[3087] 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. - #brainteasers #math #riddles - Correct Answers: 22 - The first user who solved this task is Allen Wager
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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.
#brainteasers #math #riddles
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A teacher was giving a lesson...

A teacher was giving a lesson on the circulation of the blood. Trying to make the matter clearer, she said, "Now, class, if I stood on my head, the blood, as you know, would run into it, and I would turn red in the face.."
"Yes," the class said.
"Then why is it that while I am standing upright in the ordinary position the blood doesn't run into my feet?"
A little fellow shouted,
"Cause your feet ain't empty."
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H.L. Callendar

Died 21 Jan 1930 at age 66 (born 18 Apr 1863).Hugh Longbourne Callendar was an English physicist who was famous for work in calorimetry, thermometry and especially, the thermodynamic properties of steam. He published the first steam tables (1915). In 1886, he invented the platinum resistance thermometer using the electrical resistivity of platinum, enabling the precise measurement of temperatures. He also invented the electrical continuous-flow calorimeter, the compensated air thermometer (1891), a radio balance (1910) and a rolling-chart thermometer (1897) that enabled long-duration collection of climatic temperature data. His son, Guy S. Callendar linked climatic change with increases in carbon dioxide (CO2) resulting from mankind's burning of carbon fuels (1938), known as the Callendar effect, part of the greenhouse effect.«
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