What is a Radian?

In this applet, you will explore a radian.

1. Use the slider to change the angle. How many radians are there in a full circle? 2. Does changing the radius (r) affect how many radians there are in a circle?

New Resources

Astroid
Tracing r = 2 cos(θ)
分數化百分數：練習
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רישום חופשי

Discover Resources

circles
Dialation
Spotty circle triangles 9 spot
ex 2.10(4)

Discover Topics

Similar Triangles
Division
Root
Poisson Distribution
Similarity Transformation or Similarity