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?​

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.