Final answer:
To find the measure of ∧5, subtract the measure of ∧1 from 180 degrees.
Step-by-step explanation:
To find the measure of ∧5, we need to use the concept of angles in a straight line. In a straight line, the sum of all angles is 180 degrees. Therefore, the measure of ∧5 can be found by subtracting the measure of ∧1 (160 degrees) from 180 degrees:
∧5 = 180° - 160°
∧5 = 20°
So, the measure of ∧5 is 20 degrees.