The adjacent angles of a parallelogram are in the ratio of 4 : 5. What are the measure (in degrees) of the larger angle?
Show answer & explanation
Correct answer: B
Explanation
Sum of adjacent angles of parallelogram = 180°
Let the angles be 4x and 5x.
4x + 5x = 180
9x = 180
x = 20
Large angle = 5 × 20= 100°