



 
Hi Sue, The surface area of a circular dome is $2 \times \pi \times r \times h$ square feet where $h$ is the height of the dome and $r$ is the radius of the sphere, not the radius of the circular base of the dome. See the diagram in our response to a question from Charlie. You can find $r$ using the method in out response to a question from Chithrabhanu. Harley 



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