The Shape Of A Circle

This sort of definition does not work for the circle.

The shape of a circle. A line segment that goes from one point to another on the circle s circumference is called a chord. If it passes through the center it is called a diameter. 1 history 1 1 early history. A line that just touches the circle as it passes by is called a tangent.

A line that cuts the circle at two points is called a secant. This article is about circles in euclidean geometry and in particular. But what does that mean. A circle is a shape consisting of all points in a plane that are a given distance from a given point the centre.

And a part of the circumference is called an arc. The distance between any point of the circle and the centre is called the radius. The word pentalpha is a learned modern 17th century revival of a post classical greek name of the shape. Instead circles are defined as all the points that.

Well it is circular. Teach your children about the shape of a circle with this fun upbeat song. For example a triangle has three vertices and each of them are connected. Pentagram refers to just the star and pentacle refers to the star within the circle specifically although these are often referred to as the same.

Equivalently it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant. When we talk about other common shapes like triangles and squares we define points called vertices and explain how these are connected.