Question

Ratio of adjacent angles of a parallelogram is 4:5.the angles are
40,50
80,90
70,110
None of These ​

Answer 1

Step-by-step explanation:

As, property of parallelogram states that :

Adjacent angles of a parallelogram are supplementary (180°).

Let the angles be 4x and 5x.

=> 4x + 5x = 180°

=> 9x = 180°

=> x =180/9

=> x =20°

Finding the angles,

=> 4x = 4 × 20 = 80°

=> 5x = 5 × 20 = 100°

. °. The angles are 80° and 100°. The correct ✅ option is none of these.