# SOLUTION: If one interior angle of a parallelogram measures 120 degrees, what are the measures of the other three interior angles?

Algebra ->  Algebra  -> Parallelograms -> SOLUTION: If one interior angle of a parallelogram measures 120 degrees, what are the measures of the other three interior angles?      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Geometry: Parallelograms Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Parallelograms Question 317835: If one interior angle of a parallelogram measures 120 degrees, what are the measures of the other three interior angles?Answer by unlockmath(1599)   (Show Source): You can put this solution on YOUR website!Hello, First we need to know how many degrees are in a parallelogram. We can use the formula 180(n-2) (n is the number of sides) This works out to 180(4-2)=360 degrees. Now we can set up the following equation as: 2(120)+2x=360 Subtract 240 from both sides to get: 2x=120 Divide by 2 to get: x=60 degrees Therefore we know 2 angles are each 120 degrees and the other 2 are 60 degrees. Make sense? RJ www.math-unlock.com