Geometry Parts of a Circle

Let us study about the Parts of a circle,
A line to create a circle contains no start otherwise finish; it is a easy closed curve.
* Either point lying on the circumference of a circle is the equal distance as of the middle of the circle.
* A line section as of a point lying on the circumference of a circle to its middle is known as the radius.
* Both line segment to start and ends on the circle’s circumference is known as a chord.
* A chord to exceeds during the middle of a circle is known as the diameter.
The diameter of either circle is double as long as circle within the radius. Each circle contain an infinite number of radii also diameters. For a known circle, every diameters are congruent also every radii are congruent. A chord is a line part that connecting two points on a curve. Within geometry, a chord is frequently utilized to illustrate a line part connecting two endpoints that lie on a circle.
I hope the above explanation helped you.

Area of circle

Let us study about area of circle,
The distance around a circle is called its circumference. The distance across a circle through its center is called its diameter. We use the Greek letter π (pronounced Pi) to represent the ratio of the circumference of a circle to the diameter. In the last lesson, we learned that the formula for circumference of a circle is: C = πd. For simplicity, we use π = 3.14. We know from the last lesson that the diameter of a circle is twice as long as the radius. This relationship is expressed in the following formula: d = 2r

The area of a circle is the number of square units inside that circle. If each square in the circle to the left has an area of 1 cm², you could count the total number of squares to get the area of this circle. Thus, if there were a total of 28.26 squares, the area of this circle would be 28.26 cm² However, it is easier to use one of the following formulas:


if the radius of this circle is r, the area, A of the circle will be:
A = πr²
a circle with the radius r

where π is a constant that is approximately equals to 3.14.


I hope the above explanation was useful.

Frequency Polygon

Let us study about Frequency polygon,
Relative frequencies of class intervals can also be shown in a frequency polygon. In this chart, the frequency of each class is indicated by points or dots drawn at the midpoints of each class interval. Those points are then connected by straight lines.

The frequency polygon shown in Figure 1 uses points, rather than the bars you would find in a frequency histogram.Figure 1

Frequency polygon display of items sold at a garage sale.

Whether to use bar charts or histograms depends on the data. For example, you may have qualitative data—numerical information about categories that vary significantly in kind. For instance, gender (male or female), types of automobile owned (sedan, sports car, pickup truck, van, and so forth), and religious affiliations (Christian, Jewish, Moslem, and so forth) are all qualitative data. On the other hand, quantitative data can be measured in amounts: age in years, annual salaries, inches of rainfall. Typically, qualitative data are better displayed in bar charts, quantitative data in histograms. As you will see, histograms play an extremely important role in statistics.
Hope the above explanation was useful.

Explain Ray in Geometry

Let us study about Ray,

A ray is also a piece of a line, except that it has only one endpoint and continues forever in one direction. It could be thought of as a half-line with an endpoint. It is named by the letter of its endpoint and any other point on the ray. The symbol → written on top of the two letters is used to denote that ray. This is ray AB (Figure 1).

Figure1 Ray AB.

It is written as

This is ray CD (Figure 2 ).

Figure 2 Ray CD.

It is written as or

Note that the nonarrow part of the ray symbol is over the endpoint.

Hope the above explanation helped you.