Prove the Earth is round without vision
18209
What is the simplest way to prove the Earth is round?
56044
Does Earth's Rotation Affect Its Shape?
79727
Direct proof of non-flatness
115677
Prove the equality of circle's areas
90056
A synthetic geometrical proof required on a result regarding Isosceles triangles.
149561
Build a ring around Earth, then remove the supports
44164
Light Travels in straight line even in gravity
56911
Proving invariance of $ds^2$ from the invariance of the speed of light
106327
Prove, in this figure, that $EFGH$ is a parallelogram
48495
Is it possible to prove the independence of the parallel postulate without non-euclidean geometry?
88188
Explain proof by contradiction.
44525
Chosing a reference frame in which the Earth is at rest and doesn't rotate
944
Conditions for vertical circular motion
58932
Hard contest type trigonometry proof
36719
Gravitational time dilation at the earth's center
65491
if the curvature is constant and positive, then it is on the circunference
72072
How about an exact solution for the position of a planet as a function of time?