n.平分线；二等分线；二等分物

The bisector of an angle is a line that divides the angle into two equal parts.
角的平分线是一条将角度分成两个相等部分的线。
Draw the perpendicular bisector of the line segment to find its midpoint.
绘制线段的垂直平分线以找到其中点。
The point where the angle bisectors of a triangle meet is called the incenter.
三角形角平分线相交的点称为内心。
Use a compass to draw the angle bisector of the given angle.
使用圆规绘制给定角度的角平分线。
The perpendicular bisector of a line segment is equidistant from both endpoints.
线段的垂直平分线与两个端点的距离相等。
To construct an equilateral triangle, start by drawing the perpendicular bisector of one side.
要构造一个等边三角形，首先要画出一条边的垂直平分线。
The angle bisector theorem states that the ratio of the lengths of the two segments formed by a line intersecting a triangle's side is equal to the ratio of the lengths of the other two sides of the triangle.
角平分线定理指出，一条线与三角形一边相交形成的两段长度之比等于三角形其余两边长度之比。
Find the equation of the perpendicular bisector of the line segment joining points A(2, 3) and B(-1, 1).
求连接点A(2, 3)和B(-1, 1)的线段的垂直平分线的方程。
In a right-angled triangle, the altitude from the right angle to the hypotenuse is also the perpendicular bisector of the hypotenuse.
在直角三角形中，从直角到斜边的高也是斜边的垂直平分线。
The bisector of a circle or sphere is a plane that divides it into two equal halves.
圆或球体的平分面是一条将其分为两个相等半部分的平面。