{
 "sources": [
  "tangency-labs/solidcraft#2939"
 ],
 "what": "Offset Face on a sphere's round face",
 "source": "analytic",
 "method": "a sphere r10 whose face moves out 2 mm is a sphere r12: V=4/3*pi*12^3, area 4*pi*144, centroid at the origin, one face",
 "body_count": 1,
 "volume_mm3": 7238.229473870882,
 "area_mm2": 1809.5573684677208,
 "faces": 1,
 "center_of_mass": [
  0,
  0,
  0
 ]
}