半径是圆的弦吗?
几何是数学的一部分,处理线、实体、点、测量、角度等的属性。它也可以定义为对形状、大小等的视觉研究。欧几里得是几何之父。几何的一些主要类型是代数几何、拓扑、非欧几何、复几何、凸几何、微分几何等。一些重要的几何术语是:
- 线段:由两个端点组成的直线中的一组点称为线段。
- 雷:线的一部分只有一个端点。
- 线:一个无限细的直的一维图形,有长度但没有宽度/宽度
- 点:点是一个精确的位置,没有用点表示的长度、宽度等。
- 坐标:有助于在空间中找到一个点的术语或地址。
什么是和弦?
当一个圆的两个不同点由一条线段连接时,它被称为弦。弦的长度以长度为单位测量,无论是厘米还是米。
什么是半径?
半径是连接圆心和圆点的线段。半径的长度是给定圆直径的一半。象征性地,半径由字母“r”表示。
如果直径由公式已知,则可以确定半径的长度
r = d/2
as the diameter is double the value of radius.
半径是圆的弦吗?
回答:
As discussed above, any line segment which connects two points on the circumference of the circle is known as a chord. While a radius connects the centre of the circle with a point of a circle. Therefore, from the definition of both terms, we can state that radius is not a chord.
示例问题
问题 1. 如果给定半径,如何计算圆的直径?
回答:
The diameter of a circle can be determined with radius by using the given formula
d = 2r
as the length of the diameter of a circle is twice the length of its radius.
问题 2. 直径是和弦吗?
回答:
A diameter is a chord that connects two points of the circle passing through its center. It is known as the longest chord of the circle.
问题3.半径和半径有什么区别?
回答:
A radius is a singular form that is used to indicate a single radius. While, radii is a plural form that indicates more than one radius in the given circle.
问题 4. 所有半径的长度都相同吗?
回答:
As we know that all the points of a circle are placed at same distance from the centre. And, all the radii of a circle extends from its center to a point at the perimeter of it. Hence, the length of all radii is the same.