Respuesta :

Answer:

See below.

Step-by-step explanation:

∠G = 80°

TY = 15

∠G = ∠T (similar triangles)

OY : UN = 3: 4

TY : GN = x : 20 = 3 : 4

⇒ x/20 = 3/4

⇒ x = 15