## 03453660 4 years ago if the interior angle of every two sides of a polygon is 120 deg. find the number of sides of polygon.

1. saifoo.khan

use the formula.

2. saifoo.khan

the formula for interior angles.

3. 03453660

which formula

4. saifoo.khan

$interior \angle =\frac{(n-2)*180}{n}$

5. saifoo.khan

$120 = \frac{(n-2)*180}{n}$Cross multiply to solve.

6. saifoo.khan

can you solve now?

7. 03453660

8. Ishaan94

yup that is right Good Job : )

9. 03453660

thanks

10. saifoo.khan

well this means that the polygon is 6-sided. you can also use this formula for finding total interior angles.