what is the value of a? a =

Explanation:

Step1: Identify angle - relationship

The 141 - degree angle and angle (a) are supplementary angles (linear - pair of angles).

Step2: Use supplementary - angle formula

Supplementary angles add up to 180 degrees. So (a + 141^{\circ}=180^{\circ}).

Step3: Solve for (a)

(a=180^{\circ}-141^{\circ}).

Answer:

39