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