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» Area Calculator
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Area expresses the extent of a two-dimensional shape, in the plane. Circle, ellipse, parallelogram, rectangle, rhombus, sector, square, trapezoid, triangle. Surface area expresses the extent of a two-dimensional surface of a three-dimensional object. Cone, cube, cuboid, cylinder, sphere, tetrahedron.
Initial Data
--- 2-dimensional shapes ---
Circle
Ellipse
Parallelogram, Rhombus
Rectangle, Square
Regular polygon
Sector
Trapezium / Trapezoid (US)
Triangle
Triangle (Heron)
--- 3-dimensional shapes ---
Cone
Cube
Cylinder
Rectangular cuboid
Sphere
Tetrahedron (regular)
$$A= \pi \times r^{2}$$
Radius (r)
cables
centimetres (cm)
decimetres (dm)
feet (ft)
inches (in)
kilometres (km)
metres (m)
miles (mi)
millimetres (mm)
nautical miles (nmi)
yards (yd)
寸 sun
尺 shaku
Area (A)
Ares (a)
acres
hectares (ha)
square centimetre (cm²)
square feet (ft²)
square inches (sq in)
square kilometres (km²)
square metres (m²)
square miles
square millimetre (mm²)
square yards (yd²)
坪 tsubo
歩 bu
畳 jō
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