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GCSE Chemistry · key term
A line where two faces of a solid meet; for a cube, every edge has the same length.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Surface areas and volumesEvery edge has the same length, so one measurement is enough to determine both its total surface area and its volume.
Write the formula before substituting the edge length: or .
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Keep the edge length in one unit throughout the calculation. Convert it before squaring or cubing if necessary.
Use brackets on a calculator when the edge length is written in standard form, for example .