Many Geometry textbooks instruct the teacher to distinguish between a line segment $\overline{DE}$ and its length $DE$ by writing a line over the letters and to distinguish between an angle $\angle BCD$ and its measure (in degrees) $m \angle BCD$ by including an $m$ for measure. However, I have gone the entire year not writing lines over my letters or extra $m$'s in front of my angle symbols, and not one student has asked me to clarify. It's the job of the teacher to sort through needed and needless distinctions and present the material pre-digested to the students. In our class, I have found this segment vs. length distinction is not needed.
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About Me
I started this blog to share my transformation from math nerd to math nerd who loves to share math with young people. I teach high school in Hanoi, Vietnam. Your comments are always welcome. Archives
May 2021
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