Question

In Fig. 9.49, if l1 || l2, the value of x is​

Answer 1

Answer:

If l1 || l2, then

(b + b) + (a + a) = 180° (interior angles on same side of transversal)

=> 2b + 2a = 180°

=> 2(b + a) = 180°

=> b + a = 180/2 = 90°

From the triangle in the figure,

a + b = x + x (Exterior angle property)

=> 90° = 2x

=> x = 90/2

=> x = 45°

Therefore, x is 45°

Answer 2

Answer:

Step-by-step explanation:

Friend its 45

Because 2a+2b=180

a+b=90

And 2x=a+b ( exterior angle property)

2x=90

x=45