Question

9. In Fig. 6.20, find x if AB||CD||EF.

FOR CLASS 9TH

Plz help me ​

Answer 1

Answer:

x = 20°

Step-by-step explanation:

since ab||cd,

angle c = angle b [ alternate angles are equal]

which is 60°

since cd || ef,

angle e (140°) and angle c - x are supplementary [interior angles]

angle c- x= 140 - 180

= 40

total angle c = 60°

therefore x = 60 - 40

= 20

brainliest plz

Answer 2

angle DCE + angle FEC = 180 °

angle DCE + 140° = 180 °

angle DCE = 180° - 140° = 40 °

angle BCD = angle ABC ( alternate interior angle )

angle BCD = 60°

x + angle DCE = 60 °

x + 40° = 60 °

x = 60 ° - 40°

x = 20° Ans