Respuesta :
Answer:
30°
Step-by-step explanation:
see attached.
If one angle is given as 120 deg,
because the triangle is isosceles, that mans that the base angles are identical. Hence, the other angles must be (180 - 120) / 2 = 30 deg

Answer:
30°
Step-by-step explanation:
see attached.
If one angle is given as 120 deg,
because the triangle is isosceles, that mans that the base angles are identical. Hence, the other angles must be (180 - 120) / 2 = 30 deg