OK I need a math genius here: I mentioned that if you place your eye on the line, horizintally orientated to look to the horison, every line points to the hori

OK I need a math genius here: I mentioned that if you place your eye on the line, horizintally orientated to look to the horison, every line points to the horizon. * 8 different measurments to the horizon... Would it be possible to calculate the size of the earth by using a building as such. Where you can see and maybe measure and raise the height of all 8 views of the alignment to the pyramid to the slope away from its location to the horizon, then extrapolate the curve from your vision to horizon to determine overal size of sphere... +|- I can't maths this good - If this is an interesting Q to you, please give me an ELI5