Find position of centre of mass of four particle system, which are at the vertices of parallelogram, as shown in figure.

Find the position of centre of mass for a system of particles places at the vertices of a regular hexagon as shown in figure

Find the position of centre of mass of the section shown in figure

Find the position of centre of mass of the section shown in figure

Find out the position of centre of mass of the figure shown below.

Find centre of mass of a system of three particle kept at the corner equilateral triangle as shown in figure

Find the position of centre of mass of the uniform lamina shown in figure.