Problem
Write an equation for the sum of the angles in this triangle. Use your equation to find the value of $x$. Give your answer in degrees $\left(^{\circ}\right)$. Not drawn accurately
Solution
Step 1 ：\(x + 2x + 5x = 180^\circ\)
Step 2 ：\(8x = 180^\circ\)
Step 3 ：\(x = \frac{180^\circ}{8}\)
Step 4 ：\(x = \boxed{22.5^\circ}\)
