Apologia Physics: Problems In Module 3.

Rob has been working with the guys on problem sets, which is slow.  Today is a quiz to check for understanding.  He's been working on vectors, mostly adding vectors, which involves trig.  Rob had Trig last in high school.  We are not planning to spend a lot of time on vectors. Today, we do want to finish linear motion.  Rob has been reviewing more on height of a building, which can be calculated with a protractor a couple ways.   First is by using A protractor at a 45 degree angle; at a 45 degree angle, the tangent of 45 degrees is one.  With this approach, you're using Pythagorean Theorum.

One more note.  You measure the 45 degree angle with a protractor.
Here is another explanation.