Definition:Imperial/Length/Yard
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Definition
The yard is an imperial unit of length.
\(\ds \) | \(\) | \(\ds 1\) | yard | |||||||||||
\(\ds \) | \(=\) | \(\ds 3\) | feet | |||||||||||
\(\ds \) | \(=\) | \(\ds 36\) | inches | |||||||||||
\(\ds \) | \(=\) | \(\ds 91 \cdotp 44\) | centimetres | |||||||||||
\(\ds \) | \(=\) | \(\ds 0 \cdotp 9144\) | metres |
Historical Note
The yard was originally defined in terms of a bronze standard.
It was redefined in $1963$ in the UK Weights and Measures Act as exactly $0 \cdotp 9144$ metres.
Sources
- 1944: Alfred E. Holbrow: Geometrical Drawing (12th ed.) ... (previous) ... (next): Section $\text I$. Introduction
- 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.5$ Factors for Converting Customary U.S. Units to SI Units
- 1966: Isaac Asimov: Understanding Physics ... (previous) ... (next): $\text {I}$: Motion, Sound and Heat: Chapter $2$: Falling Bodies: Free Fall
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): yard
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): yard