how do you find the surface area of a cirdular cone and how does it relate to the slant of the cone?

Question

i meant the exact formula........
but thanks

omg will someone pleez answer.........

Answer 1

A = pi * radius^2 + pi * radius * slant

Answer 2

For a right circular cone with height h and base radius r, the slant height of the cone, s, is defined to be

s=\sqrt{r^2+h^2}.

(Not including the area of the base) the surface area, S, of the cone is

S=\pi r s=\pi r \sqrt{r^2+h^2}.

Thus, the surface area is \pi r times the slant height! :)

Answer 3

Area of the cone = area of the base + area of the cone part

=[pi * R^2] + [pi * R * S]
=pi * R * [R + S]

R is the radius of the base
S is the slant of the cone

If you only know the height ("H") of the cone, then you find "S" this way:

S = sqrt(R^2 + H^2)

sqrt means "square root"

Answer 4

The slant height of a slope, given that its base radius is R and height H, is S = sqrt(R^2 + H^2). The surface area of the cone is pi*S*R. If we include the base, its pi*R^2 + pi*S*R.

Answer 5

Pi*r(l+r)

Where pi=constant pi, r=radius, l = slant height

You are basically adding the area of the circular base (pi*r^2) with the surface of the cone part (pi*r*l).

Answer 6

Cut the cone into its base and its conical part. Now cut perpendicular from the rim of the conical part to the tip of the cone, and unroll it. You now have a small circle (the base) and part of a larger circle. The radius of the larger circle is the length of the cut you made, while the amount of its arc that you have is determined by the circumfrence of the base circle. You can figure out the rest: what is the area of this piece of the big circle, in terms of the cut length and the radius of the smaller circle?

Answer 7

r=radius and s=slant height

pi(r^2)+pi(r)(s)