We are given a diagram with two parallel lines intersected by a transversal. One angle is labeled as $53^\circ$. We need to find the measure of the missing angle, which is adjacent to the $53^\circ$ angle and forms a straight line.

1. Problem Description

We are given a diagram with two parallel lines intersected by a transversal. One angle is labeled as $53^\circ$. We need to find the measure of the missing angle, which is adjacent to the $53^\circ$ angle and forms a straight line.

2. Solution Steps

Since the two angles form a straight line, they are supplementary angles.

Supplementary angles add up to $180^\circ$.

Let the missing angle be $x$.

Then, $x + 53^\circ = 180^\circ$.

Solving for $x$, we have:

$x = 180^\circ - 53^\circ$

$x = 127^\circ$

3. Final Answer

The measure of the missing angle is $127^\circ$.