e figure 10.15, show that:ABII CDCD II EFAB II EFfy your answer.407 B1

1.	e figure 10.15, show that:ABII CDCD II EFAB II EFfy your answer.407 B1602020Â°Fig. 10.15
Answer» since angle ABC = 40 = Angle ( BCE+ECD) , so these makes alternate interior angle..so AB \|\| CD now angle ECD + angle CEF = 20°+ 160° = 180° (adjacent angles) so EF\|\|CD and because CD is parallel to both AB and EF SO, AB\|\|EF

e figure 10.15, show that:ABII CDCD II EFAB II EFfy your answer.407 B1602020Â°Fig. 10.15

Answer»

since

angle ABC = 40 = Angle ( BCE+ECD) , so these makes alternate interior angle..so AB || CD

now angle ECD + angle CEF = 20°+ 160° = 180° (adjacent angles) so EF||CD

and because CD is parallel to both AB and EF SO, AB||EF