What is the formula for the area and perimeter of a cone

Let the generatrix length of the cone be l and the radius of the circle on the bottom be r
Then the radius of the expanded sector is l, and the arc length is 2 π R (that is, the circumference of the bottom circle). According to the sector area formula, the side area s = 1 / 2 * L * 2 π r = l π R

What is the surface area of a triangle
formula

You mean pyramid?
Triangle area: base times height divided by 2
Pyramid surface area: if there are several triangles, add a few areas
There is no formula for surface area
There is a formula for volume

Cylinder, cone, circle, triangle volume and surface area formula? What are the conditions to use this formula?

There is only volume formula for a cone, but no surface area formula. The volume formula of a cone is one third of the bottom area × height. The volume formula of a cylinder is the bottom area multiplied by height. The surface area is the side area of the cylinder + the area of two bottom surfaces [the side area of the cylinder equals the perimeter of the bottom surface * height]. The area formula of a circle is the square of the radius * π, The perimeter is the diameter * π. A triangle has only the formula of area. The area of a triangle = base × height △ 2

How to calculate the surface area formula of triangle cone
If you know everything, you need the surface area formula

A triangle cone? What's that? A cone, right?
S = π R (L + R). Is the total area
R is the radius of the circle at the bottom of the cone
L is the bus length of the cone

Cuboid volume calculation formula
For example, what is the volume of a rectangle
50 * 60 * 70 / 1000000 = 0.21 M3
So if the volume is to be changed to 0.13 cubic meters, what is the length * width * height?
50 * 60 * 70 is proportional 0.13 / 0.21 = 61.90%
1000000 is immutable
How to convert?
The one on the first floor is wrong. You can count it yourself
313743/1000000=0.0493
My answer is 0.13
thank you!

The process of this problem has infinite decimals. If you divide it, it will be inaccurate
The root sign cubic of 0.13 / root sign cubic of 0.21 is about 0.8522651
50*0.8522651=42.613255
60*0.8522651=51.135906
70*0.8522651=59.658557
If you use Nanyan's computer, you can get more accurate data

Cuboid volume calculation formula

Cuboid volume = length * width * height

The letter formula for calculating the volume of a cuboid is The letter formula for calculating cube volume is ．

(1) The letter formula of cuboid volume is: v = ABH; (2) the letter formula of cuboid volume is: v = A3; so the answer is: v = ABH; v = A3

Calculation formula of triangle volume

It should be a triangle. The area of a triangle is multiplied by its width. A triangle is a face, not a body, so it has only area and no volume,

What is the volume formula of triangle?

You are talking about the triangular pyramid, because the triangle is a plane figure, a two-dimensional figure, only the area, no volume, three-dimensional solid figure has volume. The volume of the triangular pyramid = the area of any side of the triangular pyramid * the height of the surface * 1 / 3, I hope it is useful for you~

The volume formula of triangle

The volume of a triangular pyramid = the area of any side of the pyramid * the height of that side * 1 / 4
I.e. volume = 1 / 4 (bottom area * height)

What is the formula for the area and perimeter of a cone