Okuzeka
Mathematics vocabulary · Geometry

Area

Meaning in mathematics, with examples

/ˈeriə/nounCore term

In mathematics, area means: The size of a flat surface, measured in square units such as cm² or m²; a rectangle 4 m long and 3 m wide has an area of 12 m².

In Turkish: alan

How it is used

You find, calculate or work out the area of a shape. Learn the standard formulas: rectangle length × width, triangle ½ × base × height, circle πr². 'Surface area' is the total area of all the faces of a solid.

Example sentences

  1. The area of a circle with a radius of 5 cm is about 78.5 square centimetres.

  2. Find the area of the shaded region.

Common collocations

  • area of a circle
  • surface area
  • find the area
  • shaded area
  • square units
  • perimeterThe total length of the boundary of a flat shape; for a rectangle 5 cm long and 3 cm wide, the perimeter is 16 cm.
  • volumeThe amount of space a solid object takes up or a container holds, measured in cubic units such as cm³ or m³.
  • radiusThe distance from the centre of a circle or sphere to any point on its edge; it is half the diameter.
  • triangleA flat shape with three straight sides and three angles; the angles inside any triangle always add up to 180 degrees.

More terms: Geometry

Practise with graded reading

Reading at the right level is the fastest way to make new words stick. Pick free English books by level: