Central angle in circle calculator
Calculator show relation between two central angles in circle (disk).

# Beta version#

BETA TEST VERSION OF THIS ITEM
This online calculator is currently under heavy development. It may or it may NOT work correctly.
You CAN try to use it. You CAN even get the proper results.
However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.
Feel free to send any ideas and comments !

# Some facts#

• When we draw two rays from the center of the circle (or disk) containing radius, we get two complementary angles.
• The angle whose arms have a beginning in the center of the circle and contains its radius is called the central angle.
• The sum of the central angles in the circle is 360 degrees (2π radians). Sometimes we say that these angles complement each other.
• When we know one central angle $\alpha$, we can calculate the second one:
$\beta = 360^{\circ} - \alpha = 2\pi - \alpha$
• The angle whose measure is 360 degrees is called full angle, 180 degrees half-full angle.
• ⓘ Hint: