Answer:
1. 30°
2. 46°
3. 55°
Step-by-step explanation: To understand these questions, you need to know that the three angles added together (no matter the size of the triangle) are equal to 180°. All you have to do here is add together the given angles and subtract that from 180°. And there you go! You get the answer, easy peasy!
Hope this helped! ;)
