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CIRCLE

 

circle-https://www.mechengineeringdrawing.blogspot.com


Post Summarization:


● Definition of circle.

● Diameter.

● Radius.

● Circumference or Periphery.

● Arc.

● Chord.

● Segment.

● Sector.

● Quadrant.

● Tangent and Normal.

● Concentric circles.

● Eccentric circles.

● Tutorial videos.



Circle (Definition):


A plane figure bounded by a curve which formed by a Locus of a Point that rotates on a path so that it is always at a fixed distance from a stationary point (Centre point).


Terms Used In Circle:


Some terms are frequently used in circles. These are as follows:

Diameter: 

The length of a straight line between two points on the curve and passing through the center point of the circle is called Diameter. It is denoted by 'D' or 'd' or 'Φ' (Phi).


circle-parts-https://www.mechengineeringdrawing.blogspot.com.jpg


Radius:

The length of a straight line, between any point on the curve to the centre point is called a Radius. It is half (i.e. D/2) of the diameter. Radius is denoted by 'R' or 'r'.


Circumference Or Periphery:

The linear length of the entire curve line is termed as Circumference or Periphery. It is equal to πD (where, π=3.14285714 or 3.143).


Arc:

A part or distance between two points on the circumference or periphery is called an Arc.


Chord:

The straight line joining the two end points of an arc is termed a Chord. The longest chord of any circle is the diameter of that circle.


Segment:

The area or plane figure bounded by a curve and a chord is termed a Segment. It is a part of a circle. See the above image.


Sector:

The part of a circle, bounded by two radii (plural of radius) meeting at an angle and an arc is called a Sector. See the above image.


Quadrant:

The part of a circle, bounded by two radii (plural of radius) making 90° with each other and an arc is termed a Quadrant. There are always four (4) quadrants in a circle, so each quadrant is one-fourth of a circle.


Tangent And Normal:

The straight line that just touches the circle at any point on its circumference or periphery but never cuts or passes through the circle when extended is called a Tangent.

The point where the tangent touches the periphery of a circle is called the "Point Of Tangency".

The straight line or radius that joins the center point of a circle and the point of tangency is called Normal. The normal always makes a 90° angle with the tangent.



Concentric Circles:

Circles within a circle, having a common center point are called Concentric circles. All types of bearings are examples of concentric circles.

concentric-circles-https://mechengineeringdrawing.blogspot.com



Eccentric Circles:

Circles within a circle, having different centers are called Eccentric circles. Ball-bearing and yo-yo are examples of concentric circles.

eccentric-circles-https://mechengineeringdrawing.blogspot.com



How To Divide A Circle Into 8 Numbers Of Equal Parts Or Sectors, Using Compass?

(Watch Vlog ⤵️)





How To Divide A Circle Into 12 Numbers Of Equal Parts Or Sectors, Using Compass?

(Watch Vlog ⤵️)





How To Divide A Circle Into 3 Numbers Of Equal Parts Or Sectors, Using Compass?

(Watch Vlog ⤵️)





How To Divide A Circle Into 5 Numbers Of Equal Parts Or Sectors Using Compass?

(Watch Vlog ⤵️)






How To Divide A Circle Into 8 and 12 Numbers Of Equal Parts Or Sectors Using By Sets-Square?

(Watch Vlog ⤵️)








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