Quadrilaterals ...

Two angles of a quadrilateral are equal and the other two angles are $${ 70 }^{ o}$$ and $${ 80 }^{o  }$$. Then the equal angles are:

In the given figure, $$\angle ADC = ?$$

Opposite angles of a quadrilateral $$PQRS$$ are equal. Find $$RS$$, if $$PQ = 5$$ cm.

A Rhombus is also a

All squares are 

Identify the Quadrilateral.

In parallelogram, both pairs of opposite sides are ....................

A four sided figure with all sides equal and opposite angles also equal.

Which statement(s) is/are correct?
(1)The diagonals of a parallelogram are equal.
(2)The diagonals of a square are perpendicular to each other.
(3)If the diagonals of a quadrilateral intersect at right angles, it is not necessarily a rhombus.
(4)Every quadrilateral is either a trapezium or a parallelogram or a kite.

ABCD is a quadrilateral such that $$AB = BC$$, $$AD= \cfrac{1}{2} CD$$ and $$AD = \cfrac{1}{4} AB$$. If $$BC =12$$ cm, what is the measures of AD?