Respuesta :

Answer:

B

Step-by-step explanation:

Answer:

54°

Step-by-step explanation:

Sum of angles in a triangle = 180°

Value of angles known = 5x+90*

Equation = 180 - 90 = 5x

90 = 5x

x = 90/5

x = 18

m∠2 = 3x

m∠2 = 3 x 18

m∠2 = 30 + 24

m∠2 = 54°