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AP EAMCET Engineering 18 Sep 2020 Shift 1 Paper
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© examsnet.com
Question : 45
Total: 160
A polygon has
54
diagonals. The number of sides of this polygon is ________
12
15
16
9
Validate
Solution:
Let number of sides of the polygon is
n
, then number of diagonals is
n
(
n
−
3
)
2
=
54
(given)
⇒
n
(
n
−
3
)
=
108
⇒
n
=
12
© examsnet.com
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