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Q.

Identify the number of concave polygons from the given figures?


Question Image

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a

1

b

2

c

3

d

4  

answer is A.

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Detailed Solution

Given figures,
Question ImageWe know that,
In a concave polygon, at least one of the internal angles is a reflex angle i.e greater than 180°.   So, figure 1 is the only concave polygon.
Hence the correct option is 1.
 
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