Mathematics for IGCSE & O level - Angles (Section 2 - No. 31)
In a regular polygon, if the exterior angle is 36°, how many sides does the polygon have?
6
10
12
18
คำอธิบาย
The sum of the exterior angles of a polygon is always 360°. Number of sides = 360° / exterior angle. Number of sides = 360° / 36° = 10.