Respuesta :

Answer:

∠A = 20

Step-by-step explanation:

Given:

Vertical angles

∠A=x

and

∠B=5x−80

Find:

∠A

Computation:

∠A = ∠B

x = 5x - 80

4x = 80

x = 2o

∠A = 20

Answer:

A=20

Step-by-step explanation: