In the adjoining figure, if QT perpendicular PR, TQR = 40° and SPR = 30°, find x and y.
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in triangle QTR
40+x+90 =180 --- sum of angles in a triangle-180⁰
x= 180- 130 =50
y = x+30 ---- exterior angle = sum of 2 interior opposite angles
y= 50+30 =80
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