Final answer:
The third angle of the triangle can be found by subtracting the sum of the given angles from 180 degrees.
Step-by-step explanation:
To find the third angle of the triangle, we need to use the fact that the sum of all the angles in a triangle is always 180 degrees. So, if the two opposite interior angles are 30 degrees and 55 degrees, the sum of those angles is 85 degrees. Therefore, the third angle can be found by subtracting 85 degrees from 180 degrees:
Third angle = 180 degrees - 85 degrees = 95 degrees
Therefore, the third angle of the triangle is 95 degrees.
Learn more about Triangle angles