In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.


Book 1, Proposition 13. - On the Equilibrium of Planes


In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.

In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.

In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.

In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.