Step by step
The question
Question: find what kind of triangle has angles 60°, 70°, 80°.
1 Check the angles
The angles of a triangle always add up to 180°.
These add up to 210°.
So no triangle has these angles: this is impossible.
60 + 70 + 80 = 210
Answer
60 + 70 + 80 = 210