Introductory Video - Quadrilaterals, Math, Class 9 Video Lecture - Class 9 | Best Video for Class 9

we see so many objects of different
shapes in our surroundings a table table
is rectangular in shape chappati is
circular in shape a set square is
triangular in shape etc have you
observed why most of the shapes are that
of a quadrilateral because they provide
uniform area or the whole surface for
example the doors and windows of a house
walls of a room books all are
rectangular or square shape
quadrilaterals are also used in graphic
arts designs and architecture you must
know what a parallelogram is you are
also aware of its properties in this
chapter we will provide you more
knowledge about parallelograms in this
chapter you will study about properties
of parallelogram necessary condition for
a quadrilateral to be a parallelogram
midpoint theorem and its converse
we hope that after studying this chapter
you will be able to crack problems based
on quadrilateral very easily