Depending on what English translation you're reading you may see this rendered as "the coasts of the earth," "the sides of the earth" or "the ends of the earth."
The Farthest Parts of the Earth
The Ends of the Earth
If the Earth has ends does that mean it has to be flat? No, because "end" is a translation of a word which means "extremity or furthest reaches of" in which case we're talking about the beach.
The Circle of the Earth
If we use deduction then we can look at the simple fact that Earth is a globe, and conclude that the meaning of the word circle in Isaiah 40:22 is sphere. In this case the Hebrew word translated as circle also means sphere.
The Nuance of the Earth’s Corners
Here's a little nuance for you: Human head don't have corners, but a beard can. We can illustrate this by putting a cheese slice on a kid's ball. The cheese has corners, the ball isn't flat.
Four Corners of the Earth in Context
Every time the phrase the four corners of the earth occurs in the Bible it's in the context of the Millennial Kingdom, which is after the plagues of the tribulation.
The Four Corners of the Earth
The phrase "the four corners of the earth" occurs a few times in scripture but every time it's in the context of the millennial kingdom, it's never used in any other context.
Circle, sphere: ח֣וּג – chug
Circle, sphere: ח֣וּג - chug * to draw a circle, to circumscribe, Job 26:10. * masc. circle, sphere, * fem. compass, compasses, Is 44:13.
March 12th
If you want to believe that earth is flat no one's going to stop you. However nothing in the Bible, either in the meaning of words or in the context of passages, requires you to believe that earth is flat and has an edge.
Matty's Paradigm 