Question

An angle of a parallelogram is 30degree less than it adjacent angle find the measures of all its angle

Answer 1

Hello,

Please refer the above photograph for the used process

The sum of adjacent angles of a parallelogram is 180.
Also, sum of co interior angles is equal to 180.

Now , by the rules of a parallelogram :
The opposite sides of a parallelogram are equal as well as parallel.
Also, the opposite angles of a parallelogram is equal to each other.

Hope this will be helping you ✌️