A problem

[Rocco Signeri]

I need help with this sterometry problem, so please feel free to help me solve it, thank you very much in advance!
When the lateral faces of the regular three-sided prism are stretched across the plain, they make up a square with a circumference of 36 cm. Calculate the surface and the volume of that prism!
SOLUTION: volume=81 cm³, surface=99²

 

[Dr.Peterson]

I need help with this sterometry problem, so please feel free to help me solve it, thank you very much in advance!
When the lateral faces of the regular three-sided prism are stretched across the plain, they make up a square with a circumference of 36 cm. Calculate the surface and the volume of that prism!
SOLUTION: volume=81 cm³, surface=99 cm²

What help do you need?

What are the lengths of the sides of the square? What are the dimensions of each face of the prism?

 

[Harry_the_cat]

Three-sided prism?

 

[Dr.Peterson]

I need help with this sterometry problem, so please feel free to help me solve it, thank you very much in advance!
When the lateral faces of the regular three-sided prism are stretched across the plain, they make up a square with a circumference of 36 cm. Calculate the surface and the volume of that prism!
SOLUTION: volume=81 cm³, surface=99²

I'm assuming you are talking about a regular triangular prism like this:


But I don't get the area and volume you claim, so I may be misinterpreting something. Did you copy the wording of the problem exactly? Is there anything else you can show us?