2020 · Q75
If the sum of all interior angles of a regular polygon is twice the sum of all its exterior angles, then the polygon is
Elementary MathematicsQuadrilaterals and Polygons
- AHexagon
- BOctagon
- CNonagon
- DDecagon
Explanation
(n-2)*180 = 2*360 gives n-2 = 4, so n = 6: a hexagon. Hence option (A). Check: (6-2)*180 = 720 = 2*360, as required.