**Question 1.**
The sum of the interior angles of a regular polygon is twice the sum of the exterior angles. Find the number of sides of the polygon

**Question 2.**
Three angles of the quadrilaterals are in the ratio 2:3:4. The sum of the least and the greatest of these three angles is equal to 180°. Find all the angles of the quadrilateral

**Question 3.**
The exterior angle of a regular polygon is one-fifth of its interior angle. How many sides has the polygon?

**Question 4.**
One of the angle in the parallelogram is 80°. Find the other angles in the parallelogram

**Question 5.**
The angles of the quadrilateral is in the ratio 1:2:3:4. Find all the angles

**Question 6.**
One of the diagonals of a rhombus is equal to its sides. Find the measures of all the angles of the rhombus

**Question 7.**
In a parallelogram ABCD, the bisectors of ∠ A and ∠ B meet at O. Find ∠ AOB.

**Question 8.**
Find the value of x in the trapezium ABCD

**Question 9.**
The diagonals of a rhombus are 8 cm and 15 cm. Find its side.

**Question 10.**
Find the values of x and y in the following parallelogram.

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