Angles

 MEASURE ANGLES

To start, I measured the sides for different angles and put those values into the GY and GZ columns. To calculate the angle on my own, I divided the GY value by the GZ value. That division is basically the tangent of the angle I wanted to find.

Then, to get Excel to give me the actual angle, I used the arctangent function on that result. The thing is, Excel gave me those numbers in radians at first (in the ARC TANG column), so I had to convert them into degrees in the ANGLE column so they made more sense. For example, in the first row, it came out to 30.50°.

After that, to see if I did it right, I compared my result with the REAL ANGLE, which was the one we already knew. I subtracted the two to find the ERROR and then calculated the %ERROR to see how much I messed up in each test. In some of them, I got a really low error, like 0.82% or 2.27%, though in a few others, the percentage was a bit higher.