Please explain q. No. 1

Please explain q. No. 1 LINES ANY) ANGLES Example I : In Fig. 6.9, lines PQ and RS intersect each other at point O. If Z POR : Z ROQ : 7, find all the angles. Solution: Z POR +Z ROQ- 1800 (Linear pair of angles) But Z POR : z ROQ- 5: 7 Therefore, Similarly, Now, Z POR = Z ROQ (Given) 5 x 1800 = 750 12 7 x 1800 = 1050 12 Z POS = ZROQ= 1050 Z SOQ = ZPOR = 750 s Q (Vertically Opposite ang (Vertically opposite angl Example 2 : [n Fig. 6.10, ray OS stands on a line POQ. Ray OR and ray OT . angle bisectors of Z POS and Z SOQ, respectively. If Z x, find Z ROT. Solution : Ray OS stands on the line POQ. Therefore, But, Z POS + Z SOQ = 1800 Z POS = x

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