Question

Which of the following options are correct?
1) If each angle of a polygon is less than ${180}^{\circ }$, it is called convex polygon.
2) If each angle of a polygon is more than ${180}^{\circ }$, it is called concave polygon.
3) If at least one angle of a polygon is more than ${180}^{\circ }$, it is called concave polygon.
4) If at least one angle of a polygon is less than ${180}^{\circ }$, it is called convex polygon.

• A. (1) and (4)
• B. (2) and (4)
• C. (3) and (4)
• D. (1) and (3)

Answer 1

The correct option is D (1) and (3)

If each angle of a polygon is less than ${180}^{\circ }$, it is called convex polygon.
If at least one angle of a polygon is more than ${180}^{\circ }$, it is called concave polygon.
So, (1) and (3) are correct.