Is the earth flat?

NO.

Get on a boat and start paddling east. If you come back to your starting point, the Earth is not flat but if you fall into space on your way, there you have your answer.

If one drops an object into a deep mine it does not land at the same point corresponding to the wall from where it was dropped, this is because of the curvature of the earth and its effect on the path of the falling object.

The myth of the Flat Earth is the modern misconception that the prevailing cosmological view during the Middle Ages saw the Earth as flat, instead of spherical.
During the early Middle Ages, virtually all scholars maintained the spherical viewpoint first expressed by the Ancient Greeks. From at least the 14th century, belief in a flat Earth among the educated was almost nonexistent, despite fanciful depictions in art, such as the exterior of Hieronymus Bosch's famous triptych The Garden of Earthly Delights, in which a disc-shaped Earth is shown floating inside a transparent sphere.
According to Stephen Jay Gould, "there never was a period of 'flat earth darkness' among scholars (regardless of how the public at large may have conceptualized our planet both then and now). Greek knowledge of sphericity never faded, and all major medieval scholars accepted the Earth's roundness as an established fact of cosmology." Historians of science David Lindberg and Ronald Numbers point out that "there was scarcely a Christian scholar of the Middle Ages who did not acknowledge [Earth's] sphericity and even know its approximate circumference".
Historian Jeffrey Burton Russell says the flat-earth error flourished most between 1870 and 1920, and had to do with the ideological setting created by struggles over evolution. Russell claims "with extraordinary [sic] few exceptions no educated person in the history of Western Civilization from the third century B.C. onward believed that the earth was flat", and credits histories by John William Draper, Andrew Dickson White, and Washington Irving for popularizing the flat-earth myth.
In Inventing the Flat Earth: Columbus and Modern Historians, Jeffrey Russell describes the Flat Earth theory as a fable used to impugn pre-modern civilization and creationism.
James Hannam wrote:
The myth that people in the Middle Ages thought the earth is flat appears to date from the 17th century as part of the campaign by Protestants against Catholic teaching. But it gained currency in the 19th century, thanks to inaccurate histories such as John William Draper's History of the Conflict Between Religion and Science (1874) and Andrew Dickson White's A History of the Warfare of Science with Theology in Christendom (1896). Atheists and agnostics championed the conflict thesis for their own purposes, but historical research gradually demonstrated that Draper and White had propagated more fantasy than fact in their efforts to prove that science and religion are locked in eternal conflict. https://en.wikipedia.org/w/index.php?title=Myth_of_the_Flat_Earth&oldid=568669038

You can't find a flat place big enough to set a chair on.

No

No, It is almost a sphere, being somewhat wider at the Equator (due to gravitational pull). Apart from pictures, like above, telescopes would give you this information as well, ie, confirmation. It can not be flat, as all large celestial bodies form the same shape.

Yes. It is flat. Surrounded by Antarctica which is an ice wall holding in all of the water and land masses. What is beyond the wall, or WHAT else there may be, we do not know. But NASA are LIARS and need to be OVERTHROWN NOW.

No

No. It is round.

According to my bible it is. What about yours?