Question

which equation can be used to find the value of x? x = 60 - 40 x + 40 + 60 = 360 x + 40 + 60 = 180 x = 60 + 40

Explanation:

Step1: Recall angle - sum property of a triangle

The sum of the interior angles of a triangle is 180°. In the given triangle, the three interior - angles are \(x\), 40°, and 60°.

Step2: Set up the equation

Based on the angle - sum property, we have \(x + 40+60 = 180\).

Answer:

\(x + 40 + 60 = 180\)