Eratosthenes

Băicoi, Romania

March 2015

Flag City Country School Latitude (°) +N/-S Longitude (°) +E/-W
Băicoi Romania Liceul Tehnologic C. Cantacuzino 45.033 25.850
Date Gnomon Shadow Angle
March 16 92 cm 94 cm 45.6°
March 17 86 cm 87 cm 45.3°
March 18 87 cm 90 cm 45.9°
March 19 93 cm 93.5 cm 45.9°

March 16 measures (4 sticks - teams from 3-4 students) :
a) stick1 : 92cm; shadow : 94cm; angle: 45,57o
b) stick2 : 89,5cm; shadow : 91,5cm; angle : 46,4o
c) stick3 : 92cm; shadow : 92,5cm; angle : 45,14o
d) stick4 : 93cm; shadow : 93,5cm; angle : 45,14o

We choose team a) as closest value to the average angle : 45.56°

March 18 measures (5 sticks – 5 teams from 4 students)
Hour:11.50( clasa a II-a B inv. Rotaru Cristina)
a) stick1 : 90cm; shadow : 94cm;
b) stick2 : 87 cm; shadow : 90 cm;
c) stick3 : 91cm; shadow : 91.5 cm;

Hour:11.55( clasa a I A inv.Maria Furtuna)
a) stick1 : 87 cm; shadow : 91cm;
b) stick2 : 93 cm; shadow : 95 cm;

We choose team b) stick2 : 87 cm; shadow : 90 cm; as closest value to the average angle :45.85°


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