Question

15.a) Two adjacent angles of parallelogram are (2x+10) and (3y-40). Find measure
of all angles of a parallelogram,
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Answer 1

Answer:

add this 2 with 360 to get answer

Answer 2

(2x+10)+(3y-40)+(2x+10)+(3y-40) = 360 degree

4x+20+6y-80 = 360

4x+6y-60 = 360

4x+6y = 360+60

4x+6y = 420