Question

if l parallel m find the value of x

Answer 1

another property is also used that is vertically opposite angles

Answer 2

Answer:

The value of x is 20°

Step-by-step explanation:

Refer the attached figure

We are given that l || m

So, ∠ACE =∠ADF (Corresponding angles are equal)

∠ADF= 60°

So,  ∠ACE =∠ADF =60°

Now in ΔACB

∠ABC+∠CAB =∠ACE (Exterior angle property)

So, x+40°=60°

So,  x=60°-40°

x=20°

So, The value of x is 20°