Question

if the angles of a concave polygon is 30°,60°,90° ..... then the number of diagonals are ?
a)27
b) 35
c) 20
d) 63
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Answer 1

Answer:

the number of diagonals may be 35

Answer 2

Answer:

if it has 3 angles it is triangle..

so it has 0 daigonals