Sum of exterior angles of a quadrilateral in right angles 

Number of independent measurements required for the construction of a quadrilateral. 

A quadrilateral which has one pair of opposite sides parallel is called a

A parallelogram in which one angle is 90^o and two adjacent sides are equal is a 

In a parallelogram ABCD the value of 

ABCD is a parallelogram  

The sum of the lengths of all the four sides of a quadrilateral is called its

In a rectangle ABCD, the diagonal AC = 10 cm then the diagonal BD =

In a rhombus ABCD, its diagonals intersect at 'O'. Then AOB= 

If the diagonal AC, BD of a parallelogram meet at O, then