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Experts, please explain in neat manner (tabular or any comfortable way u want):

What is circumcentre, orthocentre, incentre and centroid? What are their properties and how can they be constructed and their specific properties! Please!

**Centroid **is the point where all the medians meet

and **circumcentre** is the centre of the circle drawn to circumscribe a given figure.

**Example :**

In the given figure AD, BE and CF are the medians of ΔABC and G is its **centroid**

and O is the **circumcentre** of ΔPQR.

The **incentre** is the point of intersection of the angle bisectors of the triangle.

Here point D is the incentre of triangle.

**Orthocentre**

__The altitudes , __perpendiculars from the vertices to the opposite sides __of a triangle meet at a point- __ORTHOCENTRE

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