Respuesta :

Answer:

Step-by-step explanation:

trey

Answer:

30

Step-by-step explanation:

A triangle equals to 180 and has 3 angles so if you have 2 angles which you do which is 87 and 63. You add them up and it will be 150 so we need one more angle to equal 180 so, we do 180-150 which will get you 30.