circling the tri angle

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Explanation: The formula for the equation of        

        a circle is (x – h)2+ (y – k)2 = r2, 

where (h, k) represent:

The coordinates of the center of the circle, 

r represents:

 the radius of the circle.

 

 The Pythagorean theorem states, for a right triangle with legs a,b

 and hypotenuse c

a2+b2=c2

By replacing c a random number

 with r The radius of a circle being

Described

 this equation becomes the equation of circle at centre (0,0) with  radius r