Why total surface area and curved surface area of sphere are same
Answers
Answer:
A sphere has just one surface only, that is curved, not plane.
So, curved surface area & total surface area of a sphere is the same…
But, if we talk about hemisphere, it has one curved & one plane surface. So, curved surface & total surface area in case of hemisphere, are 2 different areas.
We can memorize the formulae in the following order..
(1) area of circle = pi r²
(2) curved surface area of hemisphere= 2 pi r²
(3) total surface area of hemisphere = 3 pi r²
(4) curved surface or total surface area of sphere = 4 pi r²
Step-by-step explanation:
Answer:
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Step-by-step explanation:
sphere has just one surface only, that is curved, not plane.
So, curved surface area & total surface area of a sphere is the same…
But, if we talk about hemisphere, it has one curved & one plane surface. So, curved surface & total surface area in case of hemisphere, are 2 different areas.