Eratosthenes

Petroupolis, Greece

December 2014

Flag City Country School Latitude (°) +N/-S Longitude (°) +E/-W
Petroupolis Greece 4o Junior High School 38.036 23.674
Date Gnomon Shadow Angle
December 19 100.1 cm 183 cm 61.3°

On december 19 : four groups of students

1. gnomon: a map height 100,1 cm

shadow:1,83 m (measurent using french meter)

angle : 61.322°

2. large cylinder height: 144,6cm

shadow (cm):255,2 255,1 255,0 255,2 255,1 average shadow 255,1

angle : 60.463°

3. small cylinder height 100,3cm

shadow(cm): 183,5 183,6 183,5 183,5 183,6 average shadow: 183.5 cm

angle:61.339°

4. Stick in a bottle height:132,8 cm

average shadow 229,2 cm

angle : 59.912°


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