Respuesta :
Answer: 3420 degree
Explanation:
The sum of n sided interior angle of a polygon is: (n - 2) x 180 degree
Since our polygon has 21 sides:
(21 - 2) x 180
= 19 x 180
= 3420 degree
Explanation:
The sum of n sided interior angle of a polygon is: (n - 2) x 180 degree
Since our polygon has 21 sides:
(21 - 2) x 180
= 19 x 180
= 3420 degree