Quadrilaterals ...

A quadrilateral has three acute angles, each measuring $$75^o$$. Find the measure of the fourth angle.

$$X, Y$$ are mid-points of opposite sides $$AB$$ and $$DC$$ of a parallelogram $$ABCD. AY$$ and $$DX$$ are joined intersecting in P; $$CX$$ and $$BY$$ are joined intersecting in Q. What is $$PXQY$$?

In quadrilateral $$ABCD$$, if $$\angle A = 60^{\circ}$$ and $$\angle B : \angle C : \angle D = 2 : 3 : 7$$, then find $$\angle D$$.

The diagonals of a parallelogram $$ABCD$$ intersect at $$O$$. A line through O intersect AB at X and DC at Y. Identify the correct option

In a quadrilateral $$ABCD$$, the angles $$\angle A, \angle B, \angle C$$ and $$\angle D$$ are in the ratio $$2 : 3 : 4 : 6$$. Find the measure of each angle of the quadrilateral.

Which of the following group is true for quadrilateral $$ ABCD$$?

The angles of a quadrilateral are in the ratio $$3:5:9:13$$. Then angles of the quadrilateral respectively are ___________.

In a quadrilateral, the angles are $$x^{\circ}, (x + 10)^{\circ}, (x + 20)^{\circ}, (x + 30)^{\circ}$$. Find the value of $$x$$.

The sum of pairs of opposite angles of a cyclic quadrilateral is:

Match the following.