Question

How do I find the surface area of a cylinder

Answer 1

2πrh+2πr²

Explanation:

r=radius (of the circle, top/bottom)

h=height of cylinder

Answer 2

2
`/pi`r^2+2
`/pi`r

Explanation:

There are two parts to a cylinder:

The 2 bases

Lateral Area.

Since the lateral area is around the 2 bases, the length of it is 2
`/pi`r because that’s the circumference of the base. Since the height of the lateral area is the height of the cylinder, the lateral area is 2
`/pi`rh.

Since the area of a circle is
`/pi`r^2, we multiply it by 2 since there are 2 bases and get 2
`/pi`r^2+2
`/pi`r.