Fill in the blank:

A rhombusis a plane that has _____ vertices.

Find the area of rhombus whose adjacent sides are a and b.

Complete:

The opposite sides in the rhombus are____

Find the angle at which the diagonals interests in rhombus.

Which kind of triangle is formed when diagonals bisect each other in rhombus.

 Let $A$ and $q$ are area and diagonal of rhombus, find the other diagonal $p$ .

Find the sum of two adjacent angle in rhombus.

Complete:

The opposite anglesin the rhombus are____

 Complete:

In rhombus all the sides are_____. 

 Find the perimeter of rhombus whose side is s.