SOLUTION: Please explain to me how to do this kind of proof: Two spheres have radii a and b. Prove that the ratio of the areas is a^2 : b^2

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Question 84731This question is from textbook Geometry
: Please explain to me how to do this kind of proof:
Two spheres have radii a and b. Prove that the ratio of the areas is a^2 : b^2
This question is from textbook Geometry

Answer by PS(13)   (Show Source): You can put this solution on YOUR website!

Surface Area of a sphere =
So, Area of a sphere of radius a =

Area of a sphere of radius b =
Ratio of the areas = =




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