Question

15. In the given figure, l1 = 55°, 12 = 20°, 3 = 350 and 4 = 145º prove that AB ||D.​

Answer 1

Answer:

Step-by-step explanation:

Answer: angle 1 =55

Angle 2 =20

Angle 3 =35

Angle 4 =145

To prove ABllCD

Solve angle 2 + angle 3

So angle1=angle2+angle3

Angle ABM=angleBMn(alt.angle)

ABllMN

Now

Angle3+angle4

=angle 35+ angle 145=180

Then MNllCD

From i and ii we have

ABllCD

Hence proved