Q 4 In the figure, for what value of x is l1∥l2 - Maths - Lines and Angles

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Q 4 In the figure, for what value of x is l 1 ∥ l 2 ?

Ankita Agarwal · Accepted Answer

Dear Student,
In the given diagram, Given ∠B=78°,∠CAl2=35° and ∠BAl2=∠BAC+∠CAl2As∠B=∠BAl2=78°             Alternate interior anglesSo, ∠BAC+∠CAl2=78°∠BAC+35°=78°∠BAC=43°Now in ∆ABC∠ABC+∠BCA+∠CAB=180°        Sum of triangle is 180°x+90°+43°=180°x=180°-133°x=47°
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Q.4. In the figure, for what value of x is l 1 ∥ l 2 ?

Q.4. In the figure, for what value of x is $l_{1} ∥ l_{2}$ ?