arc, chord, diameter, crescent, sector, central angle

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• arc, 호

 

 

 

$\begin{array}{l}\widehat{AB}\end{array}$

 

The part of a circle with two points(A, B) on e circle at both ends.

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$\widehat{ADC}$

is the major arc.

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$\widehat{ABC}$

is the minor arc.

 

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• chord, 현

 

$\begin{array}{l}\stackrel{⎯⎯}{AB}\end{array}$

 

A line segment that connects two points on a circle. 

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• diameter, 지름

 

The string passing through the center of the circle, the longest of the strings.

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• crescent, 활꼴

 

symbol: ⌓

A figure made up of arc and chord.

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• sector, 부채꼴

A figure made up of arc and two of radii.

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• central angle, 부채꼴의 중심각

 

The angle at which the two radii meet at the center of the circle.

 

https://mathbang.net/98#gsc.tab=0