Quadrilaterals ...

Three angles of a quadrilateral are $$75^{\circ}, 90^{\circ}$$ and $$75^{\circ}$$. The measure of fourth angle is?

One angle of a quadrilateral is of $$108^o$$ and the remaining three angles are equal. Find each of the three equal angles.

$$D$$ and $$E$$ are the mid-points of the sides $$AB$$ and $$AC$$ of $$ABC$$ and $$O$$ is any point on side $$BC. O$$ is joined to $$A$$. If $$P$$ and $$Q$$ are the mid-points of $$OB$$ and $$OC$$ respectively, then $$DEQP$$ is:

Can all the angles of a quadrilateral be acute angles? 

State true or false:

Can the angles $$110^o, 80^o, 70^o$$ and $$95^o$$ be the angles of a quadrilateral?

All the angles of a quadrilateral are equal. What special name is given to this quadrilateral?

In a quadrilateral three angles are in the ratio $$3 : 3 : 1$$ and one of the angles is $$80^{\circ}$$, then other angles are :

Three angles of a quadrilateral are $$60^{\circ}, 110^{\circ}$$ and $$86^{\circ}$$, the fourth angle of the quadrilateral is :

State true or false: