This book on Text Book of Co-ordinate Geometry (Conicoids) has been specially written to met the requirements of the B.A. and B.Sc. Part I students of various universities. The subject matter has been discussed in such a simple way that the students will find no difficulty to understand it. The proof of various theorems and examples have been given with minute details. Each chapter of this book contains complete theory and a fairly large number of solved examples. Sufficient problems have also been selected from various university examination papers.