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Home › Science › Mathematics › Measurements › Area

Area

British Area

  • 1 sq foot = 144 sq inches
  • 1 sq yard = 9 sq feet
  • 1 sq rod = 30.25 sq yards
  • 1 sq chain = 16 sq rods
  • 1 rood = 2.5 sq chains
  • 1 acre = 4 roods
  • 1 acre = 160 sq rods
  • 1 acre = 4840 sq yards
  • 1 sq mile = 640 acres
  • 1 sq mile = 1 section
  • 1 township = 36 sections
U.S. Area

  • 1 sq foot = 144 sq inches
  • 1 sq yard = 9 sq feet
  • 1 sq rod = 30.25 sq yards
  • 1 acre = 160 sq rods
  • 1 sq mile = 640 acres
  • 1 sq mile = 1 section
  • 1 township = 36 sections
  • 1 township = 6 miles square





Geometric Figures

  • Square – square of a side (A = s2)
  • Rectangle – length times width (A = l x w)
  • Circle – pi times radius squared (A = 3.1416 x r2)
  • Triangle – one-half times base times height (A = 1/2 x b x h)
  • Trapezoid – one half times sum of the two parallel sides times height (A = 1/2 x [parallel side 1 + parallel side 2] x h)
  • Parellogram – base times height (A = b x h)
  • Lateral Surface of a Cylinder – two times pi times radius times height (A = 2 x 3.1416 x r x h)
  • End Surface of a Cylinder – two times pi times radius squared (A = 2 x 3.1416 x r 2)
  • Total Surface of a Cylinder –
      lateral area plus end areas (A = [2 x 3.1416 x r x h] + [2 x 3.1416 x r 2]
  • Lateral Surface of a Cone – pi times radius times slant height (A = 3.1416 x sh)
  • End Surface of a Cone – pi times radius squared (A = 3.1416 x r2)
  • Total Surface of a Cone – lateral area plus end areas (A = [3.1416 x sh] + {3.1416 x r2}
  • Surface of a Sphere – four times pi times radius squared (A = 4 x 3.1416 x r2)
Metric

  • 10,000 sq. metres = 1 are
  • 100 ares = 1 hectare




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