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

# Beta version

BETA TEST VERSION OF THIS ITEM
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# Central angle - values and units

 The first central angle radian [rad]pi × radian [π × rad]degree [°]minute of arc [']second of arc ["]turnquadrantright anglesextantoctantsignhour angle (1/24 of turn)pointminute angle (1/60 of turn)grad; gradian; gonmilmil NATOmil Sovietmil Sweden (streck) <= The second central angle radian [rad]pi × radian [π × rad]degree [°]minute of arc [']second of arc ["]turnquadrantright anglesextantoctantsignhour angle (1/24 of turn)pointminute angle (1/60 of turn)grad; gradian; gonmilmil NATOmil Sovietmil Sweden (streck) =>

# 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:

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