4. The ratio between an exterior angle and an interior angle of a regular polygon is 2 : 3. Find the number of sides in the polygon.

3. AB, BC and CD are the three consecutive sides of a regular polygon. If ∠BAC = 15o; find,

(i) Each interior angle of the polygon.

(ii) Each exterior angle of the polygon.

(iii) Number of sides of the polygon.

2. In a pentagon ABCDE, AB is parallel to DC and ∠A : ∠E : ∠D = 3 : 4 : 5. Find angle E.

1. Two angles of an eight-sided polygon are 142o and 176o. If the remaining angles are equal to each other; find the magnitude of each of the equal angles.

5. Three angles of a seven-sided polygon are 132o each and the remaining four angles are equal. Find the value of each equal angle.

4. In a polygon there are 5 right angles and the remaining angles are equal to 195o each. Find the number of sides in the polygon.

3. One angle of a six-sided polygon is 140o and the other angles are equal. Find the measure of each equal angle.

2. The angles of a pentagon are in the ratio 4 : 8 : 6 : 4 : 5. Find each angle of the pentagon.

1. The sum of the interior angles of a polygon is four times the sum of its exterior angles. Find the number of sides in the polygon.

4. The length, breadth and height of cuboid are in the ratio 6 : 5 : 3. If its total surface area is 504 cm2, find its volume.