When students get used to radian angles which are fractions of \(\pi\) they sometimes focus so heavily on the fraction that they forget the \(\pi\) needs to be there. It's as if the "\(\pi\) radians" becomes it's own unit of measure.
Here's a nice little check to drop in a lesson as it serves as an accuracy reminder.
Share the first half and then reveal the second half. I'm always surprised to see how many people draw a 135 degree angle for the first (instead of a ~43 degree angle) and then correct it when they see the second part.
No comments:
Post a Comment