For Question 1, the device used to measure angles is:
B. protractor
For Question 2, if you are referring to a specific context or problem where a first angle is defined, there isn't enough information provided to determine the correct answer. You may need to provide the context or the values used previously for clarification.
For Question 3, as with Question 2, I would need the context of what angles you are referring to in order to provide an accurate answer.
If you provide more context or details around the angles in Question 2 and Question 3, I'd be glad to assist!