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what is the formula for a cylinder and a circle?

Sagot :

m11i
The surface area of a right cylinder equals [tex]2 \pi rh+2 \pi r^2[/tex]

As you can see in the attached picture, the surface area consists of two equal circles (bottom and top one) and area that would look like a rectangle, if "unraveled".

The formulae for the surface area of the circle is [tex] \pi r^{2} [/tex]. You have to multiply it by two and add to the area of the "rectangle", which equals [tex]2 \pi rh[/tex] where [tex]2 \pi r[/tex] is the circumference of the circle and [tex]h[/tex] is the height of the cylinder.
View image m11i
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