Hey there!
All the angles in a triangle add up to 180.
So,
70+30+x=180
100+x=180
x=80
I hope this helps!
~kaikers
Answer:
14.5 i think
Step-by-step explanation:
2.5 + 12 = 14.5
Answer:
71°
Step-by-step explanation:
3x° + (x - 11)° + (2x - 55)° = 360°
3x + x - 11 + 2x - 55 = 360°
6x - 66 = 360°
6x = 360° + 66°
6x = 426°
x = 71°