To solve problems with angles on a straight line, remember this important fact:

All angles on a straight line add up to 180 degrees.

This is super helpful when figuring out angles you don’t know!

Here’s an easy way to handle these kinds of problems:

1. Check the Angles You Have: Look at the angles already on the line. They may be shown to you, or you might have to work out some of them.

2. Write an Equation: If you know one or more angles, you can use the rule that they add up to 180 degrees. For example, if you know one angle is 100 degrees, set it up like this:

   $$x + 100 = 180$$

   Here, x is the angle you need to find.

3. Find the Missing Angle: To find x, rearrange the equation:

   $$x = 180 - 100 = 80$$

4. Practice with Different Problems: The more you practice, the easier it will become! Try different sets of angles until you feel comfortable.

By using this method, you can confidently solve any angle problem on a straight line. Having a picture or diagram can also help you see how the angles work together.

Happy calculating!