Question

One interior angle of a convex polygon (a convex polygon is a polygon where all angles

are less than 180 degrees) is 120 degrees. All the other angles are 130 degrees. How many sides
does the polygon have?

Answer 1

7

Explanation:

Answer 2

7 sides

Explanation:

120 + 130x = 180 * (x+1-2)

120 + 130x = 180x - 180

300 = 50x

x = 6

You get that x = 6, but there is still one angle that equals 120, so you have a 7 sided polygon.