Use the sliders to explore angle measures and the conversion formulas between degrees and radians.
An angle can be measured in radians or degrees.[br]Explain the relationship between these two measurements.
What is the measure in radians of a central angle of 90° in a circle with a radius of 2cm?[br]What about in a circle with a radius of 4cm?[br]What can you conclude?
True or false?[br]The measure of an acute angle in the unit circle is always between [math]0[/math] and [math]\frac{3}{2}\pi[/math].[br]Justify your answer, providing a counterexample if appropriate.