Question

find the measure of the missing angle.

Explanation:

Step1: Identify angle relationship

The angles on a straight line sum to \(180^\circ\). So, \(a + 140^\circ = 180^\circ\).

Step2: Solve for \(a\)

Subtract \(140^\circ\) from both sides: \(a = 180^\circ - 140^\circ\).
\(a = 40^\circ\)

Answer:

\(40^\circ\)