Dimensions (OCR GCSE Maths): Flashcards

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Dimensions
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Dimensions

Different aspects of an object that can be measured

1D objects have

Just a length

1D measurement units

cm, mm, m, km, mile

Examples of 1D objects

Straight line, piece of string

2D objects have

Area (length and width)

2D measurement units

cm², mm², m²

Examples of 2D objects

Rectangle, square, circle

3D objects have

Volume (length, width, and height)

3D measurement units

cm³, mm³, m³

Examples of 3D objects

Cube, sphere, cylinder

First step in dimensional analysis

Replace all variables with ll

What to ignore in dimensional analysis

Numbers and constants (e.g., pipi)

Formula result ll indicates

Length (1D)

Formula result l2l^2 indicates

Area (2D)

Formula result l3l^3 indicates

Volume (3D)

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