Mathematics
At a vertex of a regular polygon, exterior angle is 120°. Then the number of sides of this polygon is:
3
4
5
6
Related Questions
In a quadrilateral ABCD, AB = AD and CB = CD. Prove that :
(i) AC bisects angle BAD.
(ii) AC is perpendicular bisector of BD.
The angles of a pentagon are in the ratio 2 : 5 : 6 : 4 : 3. The largest angle is:
54°
135°
162°
108°
A quadrilateral ABCD is a trapezium if:
AB = DC
AD = BC
∠A + ∠C = 180°
∠B + ∠C = 180°
In parallelogram ABCD, diagonal AC and BD intersect each other at point O. Then:
AC = BD
∠AOB = 90°
The four triangles formed are congruent
AC and BD bisect each other