The adjacent angles of a parallelogram are in the ratio of 1 : 3. What are the measure (in degrees) of the larger angle?
Show answer & explanation
Correct answer: B
Explanation
Ratio of adjacent angles of parallelogram = 1 : 3
Sum of adjacent angles = 180°
Let angle = x and 3x
x + 3x = 180
4x = 180
x = 45°
Larger angle = 3 × 45 = 135°