Question

geometry–irl model of 3d shapes (in description!)

Answer 1

(geometry) irl model of 3d shapes

part 1, maybe? http://openstudy.com/study#/updates/562f5e4ae4b0c4f79cb8651c thanks @Nnesha

tl;dr: my project is about cups, (or ice cream cones)

so the diameter of the cylinder & cone is 6cm, and the height for both shapes is 15cm, so i need a paper with that size. how do i know the width of the paper i need for the wrap (if possible)?

i also have a hemisphere for the project, the surface area is 157cm^2 and the diameter is 10cm, so the circumference is 31.42cm i’m planning to use a balloon+newspaper to make the cup, how do i blow for exactly (or approx) 31-ish cm?