| 释义 |
central angle
central anglen. An angle having its vertex at the center of a circle.central angle n (Mathematics) an angle whose vertex is at the centre of a circle cen′tral an′gle
n. an angle formed at the center of a circle by two radii. [1900–05] cen·tral angle (sĕn′trəl) An angle formed by two rays from the center of a circle, with the center forming the vertex.Central Angle
central angle[′sen·trəl ′aŋ·gəl] (mathematics) In a circle, an angle whose sides are radii of the circle. Central Angle an angle formed by two radii of a circle. In Figure 1 angle AOB is a central angle. The number of degrees in  Figure 1
a central angle is equal to the number of degrees in the intercepted arc. |