Deriving the surface area formula for a spherical cap

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emc92
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i just need some help on how to start the process of proving it.
suggestions/recommendations/anything will help!
 

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hi emc92! :smile:

standard technique …

thinly slice the surface into shapes that you already know the area of …

in this case, horizontal slices of height dz will give you sloping rings :wink:​
 

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