Scaling a plane figure's linear dimensions by a nonnegative scale factor 
changes its perimeter 
to 
and its area 
to 
.
Scaling
See also
Expansion, Fractal, Geometric Contraction, Homothetic, Self-SimilarityExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Scaling." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Scaling.html