It’s not an assumption, the angle of incidence showed that Earth was a sphere

that is not true

and you know it

what assumptions must be made regarding the sun?

do you know?

7.2 degrees is about 1/50th the arc of an entire circle

So 800 km had to be 1/50th that of Earth

what assumptions must be made regarding the sun for this calculation?

Multiplying by 50 gives 40,000 km which is circumference not diameter, but from there it’s easy to determine

you aren't going to answer are you? 🙂

I'll help you

Let me finish first lmao

oh great

Questions can be saved until the end 🙂

So

Since it was determine that an angle of incidence in 1/50th the arc of a circle, simply dividing the circumference by pi (40,000 / 3.14) = 12,738

Pretty close to the actual number

what do you mean close to the actual number? that's what we are trying to measure. where did the "actual number" come from?

Sup ducks 😎

not much...just smashing another troll

how goes it?

flat smackin and troll whackin

Aye man I'm good just gonna go get some food me thinks

More precise calculations lol. That estimate was determined thousands of years ago... we have better tools now

oh great. please describe these tools

even better....can you send me a link to the paper?

scientific publication please

let me know if you need me to remind you what that is

bon apetite @Panto Math👀

Never heard of Eratosthenes?

yes of course.

They didn’t publish many papers back then

He did his calculations assuming Earth was a sphere and the sun was very large and very far away (i.e. parallel rays)

I'm talking about these "better tools" that we have now

please send information about these "tools" in the form of a scientific publication. thanks 😉

should be many dozens by now...

if not hundreds.

but one will be fine

What about trigonometry? By finding the angle between a plain and a mountain top, as long as you know the height of the mountain top, and the dip angle, you can simply apply the laws of sines

Still didn’t give perfect results, but it was close to what Eratosthenes calculated

The reason why a perfect calculation couldn’t exist back then it because they didn’t know the Earth wasn’t a perfect sphere (due to its rotation)