# A Circle of Radius 4 Units Touches the Coordinate Axes in the First Quadrant. Find the Equations of Its Images with Respect to the Line Mirrors X = 0 And Y = 0. - Mathematics

A circle of radius 4 units touches the coordinate axes in the first quadrant. Find the equations of its images with respect to the line mirrors x = 0 and y = 0.

#### Solution

It is given that a circle of radius 4 units touches the coordinate axes in the first quadrant.
Centre of the given circle = (4, 4)
The equation of the given circle is $\left( x - 4 \right)^2 + \left( y - 4 \right)^2 = 16$

The images of this circle with respect to the line mirrors x = 0 and y = 0. They have their centres at $\left( - 4, 4 \right) and \left( 4, - 4 \right),$respectively.
∴ Required equations of the images = $\left( x + 4 \right)^2 + \left( y - 4 \right)^2 = 16$ and $\left( x - 4 \right)^2 + \left( y + 4 \right)^2 = 16$

= $x^2 + y^2 + 8x - 8y + 16 = 0$ and

$x^2 + y^2 - 8x + 8y + 16 = 0$

Concept: Circle - Standard Equation of a Circle
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#### APPEARS IN

RD Sharma Class 11 Mathematics Textbook
Chapter 24 The circle
Exercise 24.1 | Q 11 | Page 21