subtend
动词
UK/sʌbˈtend/
US/sʌbˈtend/
定义 subtend 动词
- Transitive(及物動詞)mathematics(數學)
To extend from the endpoints of a line or curve to form an angle.
（線或邊）對向；對著（角或弧）
The inscribed angle of a circle is the angle formed by extending two lines from the endpoints of a chord to a point on the circumference.
圓的內接角是由從弦的端點延伸到圓周上的一點所形成的角度。
In a circle, the central angle subtended by an arc is twice the measure of the inscribed angle subtended by the same arc.
在圓中，由弧對向的圓心角是同一弧對向的內接角的兩倍。
The base of the triangle subtends the angle at the opposite vertex.
三角形的底邊對著對頂點的角。