How to Use a Protractor
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Diagram a Process
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Storyboard Description
How to Use a protractor graphic organizer - diagram a process
Storyboard Text
- Maybe I can help.
- GAH! Math is so stupid! It doesn't make any sense!
- This protractor thing is impossible!
- I will show you how to use it. Well, step 1...
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- Make sure the protractor is not backwards! It makes life so much easier if you can read the numbers.
- Before we measure, tell me if this is an acute, right, or obtuse angle.
- It IS acute, so that means it measures less than 90 degrees. We already know the answer is between 0 and 90 degrees!
- The line doesn't reach the numbers!
- Acute?
- There are two parts of the protractor to help you get the angle in the right place: 1) an upside-down T at the bottom middle 2) the base line (0 degrees or 180 degrees)
- We want to place the protractor on top of the angle so the middle of the T is at the vertex.
- Acute angle! 40 degrees! Take that MATH!
- Rotate the protractor so the vertex of the angle is still at the T, but one leg of the angle is lined up with the 0 degree line.
- That's OK. Don't you remember that definition about angles? Two RAYS with the same endpoint? Rays go on forever, so we can just extend the legs of the angle.
- The legs of the angle are extended, so we just need to read the numbers. Our options are 140 degrees or 40 degrees. Which is it?
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