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

Question

Philoid · Accepted 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°