Question

which equation can be used to find the value of x?
$x = 68 + 72$
$x = 72 - 68$
$x + 68 + 72 = 360$
$x + 68 + 72 = 180$
(there is a triangle image with angles 68°, 72°, and x°)

Explanation:

Step1: Recall Triangle Angle Sum

The sum of interior angles in a triangle is \(180^\circ\).

Step2: Apply to Given Triangle

The triangle has angles \(x^\circ\), \(68^\circ\), and \(72^\circ\). So, \(x + 68 + 72 = 180\).

Answer:

\(x + 68 + 72 = 180\) (the fourth option)