Guess Me?

I'm a figure in Geometry,

I too have a long history,

I think few people will still find it as a mystery,

It's all about finding 'pi',

Why I will lie?

Circumference and Arc are my parts,

Radius and Diameter are my stars,

In Maths I'm constant,

In Physics I'm in motion,

Maths students see me as a figure,

Physics student needs jigar (courage),

Ellipse, Parabola, Hyperbola are my relatives,

I know they sound very narrative,

My centre is always used as 'Point P',

Pencil and Compass is all that I can see,

Theorems and Assumptions are part of life,

So, proving them has become part of your life,

Rectangle, Square, Cone are my friends,

Don't you dare to unfriend,

You think I'm nowhere,

But, yes I'm everywhere,

From eyeballs to hand rotation,

And from all Planets to their Sun's revolution,

You will also find me in Olives,

I think now you all believe,

I'm always in my 'Degrees',

My degrees helps you get your degrees,

And I don't need any pedigree,

I hope you all agree,

Major and Minor (arcs) all are mine,

If you study me you will be fine,

Now, you guess me who am I?

Yes, I'm a "CIRCLE",

And yes, its a miracle.