1.

In Fig., if l || m, what is the value of x?A. 60B. 50C. 45D. 30

Answer»

Given that,

l ‖ m

Let,

∠1 = 3y

∠2 = 2y + 25°

∠3 = x + 15°

∠1 = ∠2 (Alternate angle)

3y = 2y + 25°

y = 25°

∠2 = ∠3 (Vertically opposite angle)

x + 15° = 2 (25°) + 25°

x = 60°



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