
Kenneth S. answered 12/20/17
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
ALL circles are similar.
All squares are similar; all equilateral triangles are similar; all regular pentagons are similar; all regular hexagons are similar; all regular heptagons are similar; all regular octagons are similar. Et cetera, et cetera, etc. All of this follows based on the definition of regular, in Geometry.