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Area - Innvista

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