What Is a Radian?
By Roy Peterson
In this learning activity you'll explore a graphical depiction of a radian for angular measurement.
In this animated object, learners use an algebraic formula to solve the following problem: An airplane travels a certain distance with the wind in the same amount of time that it takes to travel a shorter distance against the wind. Given a constant wind speed, what is the speed of the plane without a wind?
It was easier to learn from the old version. It asked, "How many radians in this circle?" and didn't reveal the answer right away, but made you step through hints. I don't remember the exact explanation it gave, but it made more sense and revealed what is a radian. The new site is flashier but the old one was more effective, at least for this segment.Posted by ShoesWork on 3/14/2015 1:43:37 PM Reply
Yes, here it is... on this one, the presentation jumps from stating the number of degrees in a circle to "therefore there's 2pi radians in a circle". The old one made it more implicit that multiplication is happening, 2pi of something...Posted by ShoesWork on 3/14/2015 1:51:58 PM Reply