Respuesta :

DeanR

Skip the Brainliest, everybody knows the angles of a triangle add to 180 degrees.

39 + 102 + x = 180

141 + x = 180

x = 180 - 141 = 39

Isosceles triangle!

Answer: 39

Answer:

39 degrees

Step-by-step explanation:

A triangle always equals 180 degrees. Therefore...

39+102=141

180-141=39

Please mark brainliest.