Eratosthenes

Marina di Carrara, Italy

September 2011

Marina di Carrara Italy M Buonarroti primary school 44°02’N 10°02’E
Date Gnomon Shadow Angle
September 23rd 100 cm 97.5 cm 44°16’ = 44.275°

Hello everybody from IC Michelangelo Buonarroti Primary School Paradiso in Marina Di Carrara (Itlaly)
The measurements in our school on 23rd. September 2011 were:
Latitude: 44º02’’N
Longitude: 10º02’ E
Gnomon:100 cm
Solar midday:11:11
Length of the shadow: 97.5 cm N
Angle: 44º16’ = 44.275°
Teacher: Rossella Bragazzi

Kaweni Mayotte-France
Ecole Ecole T17
Longitude 45°13’E
Latitude 12°46’S = -12,7667°
Angle -11°51’ = -11.86°
Marina di Carrara Italy
School M Buonarroti primary school
Longitude 10°02’E
Latitude 44°02’N = +44,033°
Angle +44°16’ = +44.275°
  • Différence de latitude : 44,033 -(-12,77) = 56,80 degrés
  • Distance entre les deux villes : 56,80 X 111,11 km = 6310 km
  • Différence entre les angles du soleil: 44,3-(-11,9) = 56,2°
  • Circonférence 6310 X 360 / 56,2 = 40 420 km

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