Question

how to solve this ?? plz help me​

Answer 1

Answer:

Let us draw a line XY parallel to ST and passing through point R.

PQR + QRX = 180 (co-interior angles on the same side of transversal QR)

110 + QRX = 180

QRX = 70

Now,

RST +SRY = 180 (co-interior angles on the same side of transversal SR)

130 + SRY = 180

SRY = 50

XY is a straight line. RQ and RS stand on it.

QRX + QRS + SRY = 180

70 + QRS + 50 = 180

QRS = 180 - 120 = 60