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Ab and Cd Are Two Parallel Lines. Pq Cuts Ab and Cd at E and F Respectively. El is the Bisector of ∠Feb. If ∠Leb = 35°, Then ∠Cfq Will Be - Mathematics

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AB and CD are two parallel lines. PQ cuts AB and CD at E and F respectively. EL is the bisector of ∠FEB. If ∠LEB = 35°, then ∠CFQ will be


  • 55°

  • 70°

  • 110°

  • 130°

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The figure is given as follows:

It is given that, AB || CDwith PQ as transversal.

Also, EL is the bisector∠BEF and∠LEB = 35°.

We need to find∠CFQ.

Since, EL is the bisector∠BEFand ∠LEB = 35°.


∠BEF = 2(∠LEB)

∠BEF = 2(35°)

∠BEF = 70°       (1)

We have AB|| CD, the ∠BEF and  ∠DFE are consecutive interior angles, which must be supplementary.

∠BEF + ∠DFE = 180°

From equation (i), we get:

70° + ∠DFE  = 180°

 ∠DFE  = 180° - 70°

 ∠DFE  = 110°        ........(2)

We have and as vertically opposite angles.


∠CFQ = ∠DFE 

∠CFQ = 110°

Concept: Parallel Lines and a Transversal
  Is there an error in this question or solution?


RD Sharma Mathematics for Class 9
Chapter 10 Lines and Angles
Q 28 | Page 57

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