Respuesta :
∠A and ∠B are vertical angles
so
∠A =∠B
x = 4x - 30
4x - x = 30
3x = 30
x = 10
m<A= x = 10
answer
m<A = 10
so
∠A =∠B
x = 4x - 30
4x - x = 30
3x = 30
x = 10
m<A= x = 10
answer
m<A = 10