first triangle ABC and then do the angle sum property , so that
angle A + B + C = 180°
Z + 40° + 30° = 180°
ANGLE Z = 180°- 70°= 110°
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first triangle ABC and then do the angle sum property , so that
angle A + B + C = 180°
Z + 40° + 30° = 180°
ANGLE Z = 180°- 70°= 110°