if two adjacent angles of a parallelogram PQRS are (10y-9)degree and (8y+45)degree, find all the four angles of parallelogram.
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2(10y-9)+2(8y+45)=180°
20y-18+16y+90=180°
4y+72=180°
4y=180-72
4y=108
y=108/4
y=27°
Put the values of y and you will get the answer
20y-18+16y+90=180°
4y+72=180°
4y=180-72
4y=108
y=108/4
y=27°
Put the values of y and you will get the answer
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