because a square or a triangle would not rotate properly
It is a circle because, the earth is a circle, and the equator stretches all the way around the earth.
Any circle on the Earth's surface whose center is at the center of the Earth is called a "great circle". Any circle with its center anywhere else is called a "small circle". Spiritually, many consider the kaaba (Mecca) to be the center of the Earth's surface.
YES. A small circle is simply a circle around the earth that does not fly over the direct opposite place on earth that a plane took off from. A great circle goes full circumference of earth, where a small circle does not. Being a circle they both fly in a constant direction.
the earth is a sphere but if you look at it as a 2d shape it is a circle
A great circle lies in the plane that includes the center of the Earth. The plane of a small circle doesn't include the center of the Earth.
A satelite circles earth. A satelite includes the moon, or man made satelites
It is a circle because, the earth is a circle, and the equator stretches all the way around the earth.
Every meridian of longitude on Earth crosses the Antarctic Circle, the Arctic Circle, and every other parallel of latitude on Earth.
The Earth's orbit is very nearly a circle, with the Sun very nearly at the center of the circle. The average distance of the Earth from the Sun ... the radius of the circle ... is 93 million miles.
Force of Gravity is why the earth circles.
because when the earth was made the big bang wanted it to bee round
A great circle