Each side of a given polygon is parallel to either the X or the Y axis. A corner of such a polygon is said to be convex if the internal angle is 90degree
or concave if the internal angle is 270degree
.If the number of convex corners in such a polygon is 25, the number of concave corners must be??

• 25-4= 21 concave corners must be thesre.
• 12 years agoHelpfull: Yes(3) No(2)
• 21 concave corners must be there.
• 12 years agoHelpfull: Yes(2) No(1)
• 90(25) + 270(n-25) = (n-2)*180.
  25 + 3(n-25) = (n-2)*2.
  3n - 50 = 2n-4
  n = 46.
  Hence, the required number of corners must be 46 - 25 = 21.
• 8 years agoHelpfull: Yes(1) No(0)