a) The ratio between an exterior angle and interior angle of a regular polygon is 1: 5. Find (i) measure of each exterior angle (ii) measure of each interior angle
(iii) The number of sides in the polygon
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Answer:
The ratio between the exterior angle and interior angle of a regular polygon is 2:3.
Each interior angle of a regular polygon =
n
180
o
(n−2)
where n = number of sides of polygon
Each exterior angle of a regular polygon =
n
360
o
According to question,
n
360
o
:
n
180
o
(n−2)
=2:3
=>
(n−2)
2
=
3
2
=>n−2=3
=>n=5
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