Q. 164.6( 7 Votes )

For what value of x will the lines I and m be parallel to each other?(i). (ii)

Answer :

(i) x=30

Given l||m

Therefore,

3x – 20° = 2x + 10° [Crossponding angles]

3x – 2x = 10° + 20°

x = 30°

(ii) x=25

Given l||m

Therefore,

(3x + 5)° + 4x° = 180°

7x + 5° = 180°

7x = 175°

x = 25°

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