In the picture below, the single arc marks an angle of 200 degrees. The double arc marks an angle of 20 degrees. Clearly, you can draw the 200 degree angle by measuring an angle of 20 degrees. Similarly, the triple arc marks an angle of 160 degrees. You can also draw your 200 degree angle by drawing an angle of 160 degrees.
200° = 180° + 20°
Here's one way to draw that.
1. Draw a horizontal line (one you can erase part of)
2. Place a dot near the middle of it, where you want the vertex
3. Draw a 20° angle upward and to the right, using your dot as the vertex and the horizontal line as one leg of your angle.
4. Erase (or ignore) the horizontal line that forms one side of your 20° angle
5. Your 200° angle extends from the horizontal line to the left of the vertex counterclockwise around to the remaining leg of your 20° angle.
The picture shows the general idea (not to scale).
Here's one way to draw that.
1. Draw a horizontal line (one you can erase part of)
2. Place a dot near the middle of it, where you want the vertex
3. Draw a 20° angle upward and to the right, using your dot as the vertex and the horizontal line as one leg of your angle.
4. Erase (or ignore) the horizontal line that forms one side of your 20° angle
5. Your 200° angle extends from the horizontal line to the left of the vertex counterclockwise around to the remaining leg of your 20° angle.
The picture shows the general idea (not to scale).