ICSE Class 9 Maths Rectilinear Figures
Polygons
PolygonsQuadrilaterals
QuadrilateralsParallelograms: Basic Properties
A diagonal of a parallelogram divides it into two congruent triangles.
In parallelogram opposite sides are equal.
A quadrilateral is parallelogram if its opposite sides are equal.Parallelograms: Diagonal Properties
Diagonals of a parallelogram bisect each other. If the diagonals of a quadrilateral bisect each other then it's a parallelogram.
Diagonals of a rectangle are equal to each other.Diagonals of a square and rhombus are perpendicular bisectors of each other.
If the diagonal of a parallelogram bisect one of its angle then it also bisects the other angle.Angle Relations in Parallelogram
Angle Relations in Parallelogram
