{
  "source": "analytic",
  "method": "solved sketch: 80x20 rectangle whose top is 4 tangent R12 arcs on 20 mm chords alternating up/down (net area 1600); prism h3: V = A h, area = 2A + perimeter*h, Green's theorem for centroid",
  "body_count": 1,
  "volume_mm3": 4799.999999999989,
  "area_mm2": 3843.711905601287,
  "center_of_mass": [
    38.11191357516195,
    -9.585748181923725,
    1.5
  ],
  "bbox": {
    "min": [
      0.0,
      -20.0,
      0.0
    ],
    "max": [
      80.0,
      5.3667504192892,
      3.0
    ]
  },
  "faces": 9
}