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How the shape of the Earth? and How big the size of the earth?

How the shape of the Earth?

The shape of the planet Earth is very similar to the oblate spherical (oblate spheroid), 
a depressed circle on the orientation flat poles causing bulging at the equator. 
This happens because the distended rotation of the Earth, 
causing the equatorial diameter greater than 43 km in diameter from pole to pole. 
The average diameter of the sphere of Earth is 12 742 km, 
or approximately 40,000 km / π. Because the meter was originally defined as 1 / 10,000,000 
the distance between the equator to the North Pole through Paris, France.
      Local topography varies slightly from the ideal shape of a smooth sphere, 
even on a global scale, this variation is very small. 
Earth has a tolerance of about one in 584, or 0.17% 
compared to a perfect sphere (reference spheroid), which is more smooth 
when compared with a tolerance of a billiard ball, 0.22%. 
Largest local deviations in the surface of the Earth is Mount Everest (8,848 m above sea level) and the Mariana Trench (10,911 m below sea level). 
Because the bulging equator, part of the earth is farthest away from the 
midpoint of the Earth is actually Mount Chimborazo in Ecuador.

The process of endogenous natural / endogenous energy is energy that comes
 from the Earth in the Earth. Workers are building the endogenous nature 
of Earth's surface. Exogenous natural force of extraterrestrial origin and destructive. 
So the force that makes a wide variety of relief on the face of this Earth as 
we know that the surface of the Earth in which we live is made ​​up of various
 formations such as mountains, valleys, hills, lakes, rivers, and so on. 
The existence of these formations, causing the Earth's surface becomes uneven. 

Formations are known as the relief of the Earth.
In the past, people thought the earth was flat like a plate. 
They are afraid of falling over the edge. 
Now, we know that the Earth is almost like a ball. 
Measurements made by the satellite showed that 
the earth was measured 43 km thicker in the middle, 
compared to its thickness from pole to pole. 
As with most people, the earth slightly protruding around the waist!
How the shape of the Earth?
People think about the edge of the Earth
How big the size of the earth?
Earth's circumference of about 40,000 miles. 
you have to fly in a jet plane for 30 hours to be able to travel that far. 
Compared to several other planets, Earth is smaller. 
Jupiter fly around in a jet aircraft would take 14 days.
How big the size of the earth?
The size of the Earth comparing with the Sun
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