In geometry, the circle is the locus of points at the same distance from a given point.
An easier way to define such geometric figure is to say that it is a closed curved line with all points equally distant from the center.
The following shows an example:
![circle-image](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uCx1OESgfUsiuTiDEtwWdqxFbD_DS9cRsSKmEGacuN9vjXRotJzSGoQz6bFe7EMngmTE-vS8XmE4IQWbDmuaX-wNF24Dx4WMGXiiEH0bvalThFXUIUBg=s0-d)
Real life examples bicycle wheels, coins, such as dimes and pennies, CDs, and MP3 players.
A line segment joining two points on the figure is a chord.The following are examples of two chords
![circle-image](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vi39bErLZRJtRNj6S3Ffj2MpjL6uUk8PqiXAxHZk1ynbu4g9r4wx2M62ywgJVCJ5ziekLOPuIT0NAbm6OJbbGHEYJ18aOnVw_u81Q2kXbwKDiDv9Cr7A=s0-d)
When a chord passes through the center,we call it a diameter. A diameter usually divides such figure into two equal halves. Each half is called a semi-circle
![circle-image](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vHqrilb-kCJglP4Nru1XeNoo6LD23dU2fO0__TMmgjUbXel-MhZFA9Y0pvURm8D-_sMp86HoQxbisvKC2ECWK38Ie6PPuzghvT681pOH261Yk46MPeeg=s0-d)
Half a diameter is called a radius.
In other words, 2 radii= diameter
![circle-image](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vNiRocBJP3fNQJ0CpTZixE1EqsMlZ27R6PTve8nMadmY41O9uTP279Gzr4OhV9rR1Ftm0-4DDRtUUo5CAHjZniH-YuHX2ry_4LCsKb6NiGHNniiy2I=s0-d)
Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems
An easier way to define such geometric figure is to say that it is a closed curved line with all points equally distant from the center.
The following shows an example:
Real life examples bicycle wheels, coins, such as dimes and pennies, CDs, and MP3 players.
A line segment joining two points on the figure is a chord.The following are examples of two chords
When a chord passes through the center,we call it a diameter. A diameter usually divides such figure into two equal halves. Each half is called a semi-circle
Half a diameter is called a radius.
In other words, 2 radii= diameter
Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems