Final answer:
The measure of the third angle in the triangle is 124°.
Step-by-step explanation:
The sum of the three angles in a triangle is always 180°. So, to find the measure of the third angle, we need to subtract the sum of the given angles (9° + 47°) from 180°.
The measure of the third angle = 180° - (9° + 47°) = 180° - 56° = 124°.
Therefore, the measure of the third angle is 124°.
Learn more about Triangle angles