Respuesta :

laura1059
100 because opposite angles are equal. The angles in the triangle above add up to 80 so the last angle must equal 100. Since angle 1 is directly opposite to that angle, it also equals 100.
alexisdominique2013

Answer:100 because all triangles add up to 180 degrees

Step-by-step explanation:

50+30=80

180-80=100

Answer-100