# Papuss's Theorem for Surface Areas

• Larrytsai
In summary, Papuss's Theorem for Surface Areas is a mathematical theorem named after the Greek mathematician Papuss, which states that the surface area of a solid of revolution is equal to the circumference of a circle with the same radius multiplied by the length of the path traced by the centroid of the generating region of the solid. This theorem is used in real-life applications, such as in engineering and architecture, to calculate the surface area of objects with rotational symmetry. Some examples of problems that can be solved using Papuss's Theorem for Surface Areas include finding the surface area of objects like cans, spheres, and cones. However, it may not be applicable to irregular or non-symmetrical objects.

#### Larrytsai

y=sqrt(2x+1), 0≤x≤2

Find the area of the surface by using the second theorem of Pappus.

S= 2pie(row)L

I cannot find what the centroid is, i have length as 2

Find the area of what surface? A graph in the xy plane is not a surface. And your arc length isn't correct.

Last edited:

## What is Papuss's Theorem for Surface Areas?

Papuss's Theorem for Surface Areas is a mathematical theorem that states that the surface area of a solid of revolution is equal to the circumference of a circle with the same radius multiplied by the length of the path traced by the centroid of the generating region of the solid.

## Who is Papuss and why is this theorem named after him?

Papuss was a Greek mathematician who lived in the 3rd century BCE. He is known for his work in geometry and is credited with discovering this theorem, hence it is named after him.

## How is Papuss's Theorem for Surface Areas used in real life?

Papuss's Theorem for Surface Areas is used in various real-life applications, such as in engineering and architecture, to calculate the surface area of objects with rotational symmetry, such as cylinders, cones, and spheres.

## What are some examples of problems that can be solved using Papuss's Theorem for Surface Areas?

Some examples of problems that can be solved using Papuss's Theorem for Surface Areas include finding the surface area of a can of soup, calculating the amount of paint needed to cover a spherical water tank, and determining the surface area of a cone-shaped roof.

## Are there any limitations to Papuss's Theorem for Surface Areas?

While Papuss's Theorem for Surface Areas is a useful tool for calculating surface areas of objects with rotational symmetry, it may not be applicable to all shapes. For example, it cannot be used to find the surface area of irregular or non-symmetrical objects.