One of the “proofs” that Earth is a globe, and not flat, that Globe Cult believers like to use in order to debunk Flat Earth is this : “You can have a triangle with three 90 degrees angles on a sphere. On a flat surface, you cannot”.
And they use this as a proof :
Now, first reaction is to agree that yes, you can have a triangle with three 90 degrees angles on a sphere, and most people, if not all, do not see the obvious in the above image.
And the obvious is : that is NOT a triangle.
A triangle is a 2-dimensional shaped figure. A sphere is a 3-dimensional shaped figure. In the image above, what you see is a SPHERICAL TRIANGLE. Since it is a SPHERICAL triangle, hence, a 3-dimensional shaped figure, it cannot be reproduced on 2-dimensional surface.
Does the image above PROVES that Earth is a sphere? No, it does not. It is a drawing.
First, it is not a triangle. A triangle have straight lines, a spherical triangle have arc shaped lines.The “You cannot draw a three 90 degrees triangle on a flat Earth” mantra is faulty, because the same is true for a sphere : ” You cannot draw a three 90 degrees triangle on a sphere”. You can draw a SPHERICAL triangle (which is NOT a triangle) on a sphere.
Can I draw a three 90 degrees shape, that looks like a triangle, on the AE map?
Sure I can :
Is the above figure a triangle? No, it is not. It is a shape that looks like a triangle? Yes, it is. Does it have three 90 degrees angles? Yes. Does it proves that the Earth is flat?
NO, IT DOES NOT. But neither is the first image. Neither of the two images have triangles. The first image have a spherical triangle, with the three sides arc shaped, and three 90 degrees angles.The second one have two straight sides, one arc shaped side, and three 90 degrees angles.
Geometrically speaking, the second image is closer to a triangle that the first image is.Both have three 90 degrees angles, but the second one have two straight sides and one arc shaped side, while the first one have all three sides arc shaped. Neither is a triangle.
Whenever a Globe Cult believer brings up this :
as a “proof” of the Globe Earth, explain to him that this is NOT A TRIANGLE, because a triangle is always, ALWAYS, a 2-dimensional figure, and a triangle will ALWAYS have the sum of its angles equal to 180 degrees.
Any OTHER drawing, object, figure, that is not 2-dimensional and doesn’t have the sum of its angles EXACTLY 180 degrees, it is NOT a triangle.
The only way to actually PROVE that the Earth is a sphere, is to travel 10,000 km along the Equator (eastward of westward, doesn’t matter), turn 90 degrees North, travel 10,000 km to the North Pole, turn 90 degrees South, and travel 10,000 km back to the Equator.
Until the above is not proved, with solid scientific proofs, the Earth cannot be proved to be a sphere.
Drawing a three 90 degrees shape on a sphere is not a proof that the Earth is a globe, the same way that drawing a three 90 degrees shape on AE map is not proof that our world is flat.
Flat Earth Education.