Question

eu quero saber quantos graus tem a medida de angulo90'

Answer 1

1° = 60'
x = 90'

1/x = 60/90 (:30)/(:30)
1/x = 2/3
1.3 = 2x
3 = 2x
2x = 3
x = 3/2
x = 1,5 °