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Area

Area Country Subdivision

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in a plane.

The simplest area for a figure is the rectangle (length x width)

A = lw (rectangle)

A = s2 (square)

A = 1/2 X b X h (triangle)

A = πr2 (circle)

A = 4πr2 (sphere)

Archimedes showed that the surface area of a sphere is exactly four times the area of a flat disk of the same radius, and the volume enclosed by the sphere is exactly 2/3 of the volume of a cylinder of the same height and radius.


See also …
en.wikipedia.org/wiki/Area

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  • Current Conditions : 65.3F, Clear - 3:27 PM CDT Apr. 26
    Temperature: 65.3°F | Humidity: 29% | Pressure: 29.91in ( Falling) | Conditions: Clear | Wind Direction: WSW | Wind Speed: 2.0mph
  • Friday as of Apr. 26 2:26 PM CDT
    Friday - Mostly sunny in the morning, then partly sunny with showers and a slight chance of thunderstorms in the afternoon. Highs in the lower 60s inland...but only in the mid 50s near the lake. Northwest winds 10 to 15 mph in the morning becoming west in the afternoon. Near the lake, gusts up to […]
  • Tonight as of Apr. 26 2:26 PM CDT
    Tonight - Partly cloudy. A 20 percent chance of showers after midnight. Lows in the upper 30s to lower 40s. South winds 5 to 10 mph in the evening shifting to the northwest 10 to 15 mph after midnight.
  • Friday Night as of Apr. 26 2:26 PM CDT
    Friday Night - Partly cloudy. A 30 percent chance of light rain showers in the evening. Lows in the mid 30s. North winds 10 to 15 mph.

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