Is there a triangle with angle measures of 30°, 70°, and 80°

Yes

Step-by-step explanation:

Interior angle of all triangles = 180°

30°+70°+80° = 180°

Yes, there is a triangle with angle measures of 30°, 70°, and 80°.

No matter what the angle measures in a triangle are, they must add up to 180° for it to be a triangle. Even if it was 178°, 1°, and 1°, it would add up to 180° and make it a triangle.