Area OF Triangle || Quadrilateral || Centres OF Triangle

Different Centres Of Triangle

Area of a triangle

Area OF triangle || Quadrilateral || n-side polygon || Condition for collinearity OF three point || Example discussion || Area OF triangle in determinant form || Equation OF line joining two point

Half angle formula||Centres OF triangle

Area OF triangle || Squas Rule || Area OF quadrilateral || Condition OF Collinearity || Area OF n sided polygon

Introduction||Area OF square||Rectangle||Circle||triangle||Perimeter OF circle|| Triangle||square and rectangle||Quadrilateral||Hexagon||Pentagon||Semi Perimeter OF Triangle||ProOF OF Heron's Formula

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

The area of parallelogram; triangle and quadrilateral in terms of cross product.

If the diagonals AC,BD of a quadrilateral ABCD, intersect at O, and separate the quadrilateral into four triangles of equal area, show that quadrilateral ABCD is a parallelogram.