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 90^o or concave if the internal angle is 270^o. If the number of convex corners in such a polygon is 25, the number of concave corners must be
A.
20
B.
0
C.
21
D.
22
Correct Answer : C

Question

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 90^o or concave if the internal angle is 270^o. If the number of convex corners in such a polygon is 25, the number of concave corners must be

A.
20
B.
0
C.
21
D.
22

Correct Answer : C

A to Z Exams · Accepted Answer

21

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