Question

An equation of the circle with centre at (0, 0) and radius r is​

Answer 1

Answer:

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Answer 2

An equation of the circle is $x^2+y^2= r^2$.

Step-by-step explanation:

Given : The circle with centre at (0, 0) and radius r.

To find : An equation of the circle ?

Solution :

The circle with centre (h, k) and radius r is given by equation,

$(x- h)^2 + (y-k)^2 = r^2$

We have given,

The circle with centre at (0, 0) and radius r.

Substitute,

$(x- 0)^2 + (y-0)^2 = r^2$

$x^2+y^2= r^2$

Therefore, an equation of the circle is $x^2+y^2= r^2$.

#Learn more

Find the equation of the circle with centre (2,3) with radius 5cm​

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