Strain \(=\frac{\Delta l}{l}\) has dimensions \(\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^0\right]\)
Angle measured in radians is also dimensionless \(\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^0\right]\)
\(\theta=\frac{l}{r}\)
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