Respuesta :

xenia168

Answer:

Step-by-step explanation:

x = 90 - 54 = 36

calistadao02

Answer:

x = 36

Step-by-step explanation:

The sum of all the angles in a triangle is 180

Add the known angles together

54 + 90 = 144

then subtract 180 and 144 to find x

180 - 144 =36