Respuesta :

Answer:

90 degrees

Step-by-step explanation:

55+35=90

180-90=90

Answer:

90 degrees

Step-by-step explanation:

The sum of the angles of a triangle are 180

55+ 35 + x = 180

90 +x = 180

Subtract 90 from each side

90+x-90 = 180-90

x= 90

The third angle is 90 degrees