Gaudeamus High School is calculating the circumference of the earth with the Eratosthenes method.

We prepared the necessary supplies:

We found the right time in our city Chisinau 

March 20, 2023, 12:13 p.m.

https://www.suncalc.org/#/47.0427,28.8934,5/2023.03.20/12:13/1/3

I used a rod at a 90 degree angle.

I determined the length of the shadow.

We measure the lenght of the shadow of the stick.

It is 1,07 m

We started trigonometric calculations.