Select all pairs of vertical angles.
Angles 1 and 3, Angles 3 and 4, Angles 2 and 3, Angles 1 and 2, Angles 1 and 4, Angles 2 and 4
![Select all pairs of vertical angles Angles 1 and 3 Angles 3 and 4 Angles 2 and 3 Angles 1 and 2 Angles 1 and 4 Angles 2 and 4 class=](https://us-static.z-dn.net/files/df9/a93fc0849d0b3957a1890471addf7cdd.png)