A practical text for research students or any candidate requiring an understanding of euclidean geometry, through the exploration of key concepts, definitions and theorems.

1. Circle
2. Standard Form of the Equation of a Circle
3. Central Form of Circle
4. General Form of Circle
5. Equation of the Circle in the Parametric Form
6. Equation of a Circle when the Coordinates of End Point of a Diameter are Given
7. Points of Intersection of a Line and a Circle
8. Condition for a Line to be Tangent to the Given Circle
9. Equation of a Tangent to a Circle