Me with question 23 using a well written explanation.

I wouldn't do it like the other person. There's a much easier way to do it. I would draw two lines intersecting each other then use supplementary angles to find it. I'll draw it to show you but if one angle is 35°, then the opposite angle has to also be 35° because they are vertical angles. Now you have one angle. You have 2 straight lines so you can do 180°-35° to get 145°. The angle opposite of that would have to be 145° as well because they are vertical angles as well.