Ch.34 properties of Triangles and circles connected with them

Ch.34 properties of Triangles and circles connected with them

1. Introduction
2. Sine rule
3. cosine formulae
4. Projection formulae
5. Trigonometrical ratios of half of the angles of a triangle
6. Area of a triangle
7 Napier’s analogy
8. Circumcircle of a triangle
9. Inscribed circle or incircle of a triangle
10. Escribed circles of a triangle
11. Orthocentre and its distances from the angular points of a triangle
12. Regular polygons and radii of the inscribed and circumscribing circles of a regular polygon
13. Area of a cyclic quadrilateral
14. Ptolemy’s theorem
15. Circum-radius of a cyclic quadrilateral