Answer: -120
Step-by-step explanation:
this would be the answer because if you take a positive and add it to a negative you get zero if their the additive inverse of the number.
Angle 2 and angle 4 are vertical angles which makes them congruent
50 degrees because 50+50= 100 +80 = 180 and there is 180 degrees in a triangle
Answer:
15 cm since its half
Step-by-step explanation: