7.SPQ+PQR=180
3x+45+4x-5=180
7x=180-40
x=20
PQR=SPR
4x-5= 4.20-5
=80-5
=75°
8. 70+80=150
SQT= 180-150
=30°
9. 90°=1/4 putaran
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7.SPQ+PQR=180
3x+45+4x-5=180
7x=180-40
x=20
PQR=SPR
4x-5= 4.20-5
=80-5
=75°
8. 70+80=150
SQT= 180-150
=30°
9. 90°=1/4 putaran