To solve the equation $a + b + c = 180$ for $c$, you need to isolate $c$ on one side of the equation. Here's how you can do it:

$a + b + c = 180$

Subtract $a + b$ from both sides of the equation:

$c = 180 - a - b$

So, the solution for $c$ is:

$c = 180 - a - b$

Would you like to go through any specific examples or have further questions on this?

Here are some related questions:

1. What are the values of $a$ and $b$?
2. How would you solve for $b$ instead of $c$?
3. What does the equation $c = 180 - a - b$ represent geometrically?
4. Can this equation be used to find exterior angles of a triangle?
5. How does the sum of angles change in a quadrilateral?

Tip: When solving equations, always check your solution by substituting the values back into the original equation to ensure they satisfy the equation.