In a triangle, let the angles be denoted as $ heta_1$, $ heta_2$, and $ heta_3$, such that $ heta_1$ is located at vertex A, $ heta_2$ at vertex B, and $ heta_3$ at vertex C. Angle $ heta_1$ is three times the measure of angle $ heta_3$, and angle $ heta_2$ is 20 degrees more than angle $ heta_3$. What is the measure of angle $ heta_1$?
Given these relationships, you can set up an equation based on the fact that the sum of the angles in any triangle equals 180 degrees:
$$ heta_1 + heta_2 + heta_3 = 180$$