Question
The sum of angles of the given figure is _____.
- 1080o
- 1980o
- 1260o
- 1800o
Hint:
Sum of internal angles of a polygon =( n-2) x 180
The correct answer is: 1800o
Let’s count the number of sides of the polygon in the given figure.
We see that n=12
Using the property of polygons,
Sum of internal angles of a polygon =( n-2) x 180
=(12-2) x 180 = 10 x 180 = 18000
By the property of polygons, we know that the sum of external angles of a polygon =360
Also,
Sum of internal angles of a polygon =( n-2) x 180
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