The Total solution for NCERT class 6-12
In a parallelogramABCD,
∠D = 1150 (Given)
Since, ∠A and ∠D are adjacent angles of parallelogram.
We know, Adjacentangles of a parallelogram are supplementary.
∠A + ∠D = 1800
∠A = 1800 –1150 = 650
Measure of ∠A is 650.