The answer is 190°.
Step-by-step explanation: We are to find the measure of ∠T which lies between 0° and 360° and is co-terminal with an angle of measure -170°.
We know that two angles are said to be co-terminal if one is obtained from the other by either adding or subtracting 360°.
So, angles which are co-terminal with -170° are
-170° + 360° = 190°, -170° - 360° = 530°, etc.
Since 190° lies between 0° and 360°, so measure of ∠T is 190°.
Thus, the answer is 190°.