Respuesta :

Ephraim999

Answer:

8

Step-by-step explanation:

LazyBun
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

Otras preguntas