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Learning Goal: I’m working on a astronomy discussion question and need an explan

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Learning Goal: I’m working on a astronomy discussion question and need an explanation and answer to help me learn.
Attention, Navigators, this is your Captain speaking,
It’s time to do something with your sextants. We are calling the inclinometer a sextant, now. The building of the sextant was worth ten points. Using it to determine the elevation of the Sun at local noon will also be worth ten points. The elevation of the Sun is the angle between the horizon and the Sun.
You will make observations of the Sun over a period of about four hours, from 10 a.m. to 2 pm., on a sunny day.
Sight along the straight edge of your sextant. Aim the straight edge at the Sun, just as you would aim the barrel of a gun. The weighted string will hang against one of the degree markings on the protractor. If you have an assistant, instruct him/her/it to take note of the degree mark the string hangs against. If no partner, try to press the string against the protractor as soon as you have sighted in the Sun, keeping the string in place, before you lower the sextant. Do this as fast as you can. Do not stare at the Sun for more than a few seconds. Wear sunglasses if possible.
Record the degree number under the string. If the degree number is less than 90, subtract the degree number from 90. For example, if you recorded 70, 90 – 70 equals 20 degrees. Record the 20 degrees. That angle is the elevation angle of the Sun. If the degree number under the string is greater than 90, subtract 90 from the degree number. For example, if you recorded 120, 120 – 90 equals 30. Record the 30 degrees. That angle is the elevation of the Sun. If you are simply writing down numbers that you see under the string and nothing more, YOU ARE DOING IT WRONG. Those numbers are not the Sun’s elevation. You must find the difference between the number under the string and 90, as explained above. THAT is the Sun’s elevation. The Sun’s elevation reaches a maximum around local noon. So, take an elevation measurement at 10 a.m., one at 10:30, 11:00, etc., every half hour until 2 pm. You will see the elevation numbers rise to a max, then decrease again. That max occurs around local noon.
Your measured elevations should fall in the range of 40 degrees to 70 degrees. I’m going to measure it too, so don’t just make stuff up. Submit a table of times and elevations. You must have credit for your inclinometer/sextant (previous project) to be eligible for points on this project.

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