Three Parallel Lines Theorem
There are two different problems in this exercise.
For the first problem type, fill in the boxes with the appropriate segment to make the proportion true then press tab or enter. If your answer is correct, it will turn green.
Click "Reset Problem" to reset the problem, or "Next Problem Type" to see problem type 2.
For the second problem type, fill in the box with the missing segment length and then press enter. If your answer is correct, it will turn green.
Click "New Problem" to see another example of this type of problem.
Click "Next Problem Type" to go back to problem type 1.