9. In Fig. 6.20, find x if AB||CD||EF.
FOR CLASS 9TH
Plz help me
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9. In Fig. 6.20, find x if AB||CD||EF.
FOR CLASS 9TH
Plz help me
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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
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