Definition:Imperial/Length/Yard

Definition

The yard is an imperial unit of length.

\(\ds \)

\(\)

\(\ds 1\)

yard

\(\ds \)

\(=\)

\(\ds 3\)

feet

\(\ds \)

\(=\)

\(\ds 36\)

inches

\(\ds \)

\(=\)

\(\ds 91 \cdot 44\)

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
• 1966: Isaac Asimov: Understanding Physics ... (previous) ... (next): $\text {I}$: Motion, Sound and Heat: Chapter $2$: Falling Bodies: Free Fall
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): yard