Question

if two adjacent angles of a parallelogram PQRS are (10y-9)° & (8y+45°),find all the four angles of parallelogram.

Answer 1

use rd sharma or rs aggarwal or oswaal guides to get ultimate answer but i will suggest u a good answer .......hope it helps
angle a =angle c  also angle b = angle d
angle a + angleb+angle c + angle d =360 degree ....
subsititute and u will get y=12