Questions OF half angle formula || Centres OF Triangle ( Incentre , Circumcentre ) & Illustration

Half angle formula||Centres OF triangle

Rhombus || Kite||Trapezium || Cyclic quadrilateral|| Distance formula || Section formula || Centres OF triangle : Centroid , Inmcentre, Circumcentre , Excentre, Orthoxcentre

Circumcentre of triangle

Half angle formulae| Area of triangle inradius| Circumradius and exradii

Derivation OF Formula || Area OF triangle || Tangent Rule and Half Angle Formula

Questions based on Cosine formula || Projection formula & Illustration