Click on the part of a circle inside an angle that has the measurement shown in the upper left corner of the box.

Pairs of blue lines are

parallel. How does this affect what you know about the angles?

Since you're doing so well, let's take off the training wheels and see how you do using just the numerical angle measurement without the picture of the angle next to it.

Now we'll throw in a variable. Whenever you get '*x* for an angle measurement, you'll need to find an angle that is exactly equal to the size of the blue sector.

That's all the game there is right now. Thanks for playing!