1.

In the adjoiningfigure, if AB || CD,then x =In the adioining​

Answer»

Correct option is

B

55

∠GEF=180−∠CEF(∵∠GEF and ∠CEF are COMPLEMENTARY angles)

∴∠GEF=30

o

and ∠GCD=∠GEF (from the FIGURE, CD∣∣EF)

⇒∠GCD=30

o

Now, ∠BCD=∠BCG+∠GCD

⇒∠BCD=25

o

+30

o

=55

o

∠ABC=∠BCD(∵AB∣∣CD)

∠ABC=x=55

o

Therefore the value of x is 55.


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