Converting degrees to radians is one thing (multiply by $\dfrac{\pi}{180^{\circ}}$). But remembering the standard reference angles in radians is a bit more of a challenge.

If you tap into you basic counting nature, it gets easier.

### Counting Reference Angles in Radians

I made an animation showing how to “count” reference angles in radians.

Notice the way the angles count around using the numerator of the fraction, while holding the denominator constant:

### Can you use it?

How about it? Will you be able to use this to teach reference angles?

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