Question

what is the value of x in the figure below? a 40 b 50 c 60 d 80

Explanation:

Step1: Use the straight - angle property

The sum of angles on a straight line is \(180^{\circ}\). So, \(x + 2x=180\).

Step2: Solve the equation

Combine like terms: \(3x = 180\). Then divide both sides by 3: \(x=\frac{180}{3}\).

Answer:

C. 60