Two angles of a polygon are right angles and every other angle is 120°. Find
the number of sides of the polygon.
plz explain sequence wise plz pls
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Answer:
Let number of sides of polygon is n.
Two angles of a polygon are right angles and the remaining are 120
o
each
Sum of total angles of a polygon is = 180
o
(n−2)
n= number of sides of polygon
Now,
2×90
o
+(n−2)×120
o
=180
o
(n−2)
180
o
n−120
o
n=180
o
+360
o
−240
o
60
o
n=300
o
n=5
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