Math Quadrilateral Made Great : With Important Points For Class 6th.7th.8th.9th.10th[1]

1) ( i ) A quadrilateral which has exactly one pair of parallel sides is called a trapezium.
( ii ) A quadrilateral in which both pairs of opposite sides are parallel is called a parallelogram.
( iii )A parallelogram in which all the sides are equal is called a rhombus.
( iv )A parallelogram in which each angle is a right angle is called a rectangle.
( v ) A parallelogram in which all the sides are equal and each angle is equal to a right angle is
called a square.
( vi ) A quadrilateral which has two pairs of equal adjacent sides but unequal opposite sides is
called a kite.

2) A quadrilateral is a parallelogram if
( i ) its opposite sides are equal, or
( ii )its opposite angles are equal, or
( iii ) its diagonal bisect each other, or
( iv ) it has one pair of opposite sides equal and parallel.

3) The diagonals of a rhombus bisect each other at right angles.

4) The diagonals of a rectangle are equal.

5) The diagonals of a square are equal and bisect each other at right angles.