Find the sum of interior angles of a dodecagon?
1). 1620°
2). 1800°
3). 1440°
4). 1260°
3. What is the reflection of the point (-1, 3) in the line x = -4?
6. Two triangles ABC and PQR are congruent. If the area of ΔABC is 60sq. cm, then area of ΔPQR will be:
7. If each interior angle of a regular polygon is $150^{0}$, the number of sides of the polygon is
8. In a triangle ABC, AB = AC and ∠A is thrice that of ∠B. Then ∠B is equal to