Q.17
17. In given figure, show that XY||EF.
36+30=66=angle XYR (which are the pair of alternate angles)
so, XY is parallel to RS
now, 150+30=180(pair of co-interior angles which are supplementry)
so, RS is parallel to EF
as, XY parallel to RS
RS parallel to EF
Therefore, XY is parallel to EF
so, XY is parallel to RS
now, 150+30=180(pair of co-interior angles which are supplementry)
so, RS is parallel to EF
as, XY parallel to RS
RS parallel to EF
Therefore, XY is parallel to EF