Question

Can someone pls help me

Answer 1

Step-by-step explanation:

since the 2 lives are parallel, this makes the 2 triangles (above l and the larger one above m) similar.

and that means their angles are the same.

and that means that the third angle in the small triangle above l is also y°.

and now, remember, the sum of all angles in a triangle is always 180°.

so,

180 = x + y + z = x + 20 + 60

x = 180 - 20 - 60 = 100°

so, B is correct.