HomeWhat is the centre and radius of a circle when x squared plus y squared -4x -2y -4 equals 0?
Wiki User
Answered 2016-06-23 14:49:03
Equation: x^2 +y^2 -4x -2y -4 = 0
Completing the squares: (x-2)^2 +(y-1)^2 -4-1-4 = 0
So: (x-2)^2 +(y-1)^2 = 9
Therefore the centre of the circle is at (2, 1) and its radius is 3
Wiki User
Answered 2016-06-23 13:00:04
You need to change the equation to the form (x - a) squared + (y - b) squared = r squared. You do this by completing the square. In this case, (a, b) will be the center of the circle, and r will be the radius.
Your Answer
Related Questions
The centre is (a, a) and the radius is a*sqrt(2).
The equation describes a circle with its centre at the origin and radius = √13. Each and every point on that circle is a solution.
Area equals pi times the radius squared.
The area of a circle is defined by the equation A = πr^2 where π = pi (3.14...) A = Area r^2 = radius squared So, the radius of a circle squared multiplied by pi equals the area.
area equals pi r squared therefor r squared equals area over pi. Now find square root of r squared and you have "R" (radius) = 2.821
Pi (3.14) times the radius of a circle squared, equals the circumference of a circle.
x2+y2-4x-6y-3 = 0 Using the appropriate formula it works out as:- Centre of circle: (2, 3) Radius of circle: 4.
A= Area of the circle¶= Pi (About 3.14)r= Radius squared (Radius times radius)3.14 * Radius squared
Area of a circle equals pi (3.14) times the radius squared.
Area of a circle is: pi times radius squared
The graph is a circle with a radius of 6, centered at the origin.
The radius of a circle that has an area of 64ft squared is: 4.514 feet.
Area of a circle equals pi (~3.14) multiplied by the radius squared. So to find the area of that circle your equation is (3.14)(3)^2 which equals approximately 27.
It is the radius of the circle.
The equation for a circle of radius r and centre (h, k) is: (x - h)² + (y - k)² = r² If the centre is the origin, the centre point is (0, 0), thus h = k = 0, and this becomes: x² + y² = r²
Centre = (0,0), the origin; radius = 11
If 0.8cm is the radius (distance from the centre to the edge of the circle) of the circle, the area of the circle is 2.010619298 cm squared. If 0.8cm is the diameter (distance from one side of the circle to the other), the circle's area is 0.5026548246cm squared.
The radius of a circle with an area of 35 mm squared is 3.34mm
The graph is a circle with a radius of 6, centered at the origin
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.
You will get pi since area of a circle equals pi* times radius squared....by Mona Martinez
General formula for a circle is X squared + Y squared = radius squared. So the answer would be x squared + y squared = 2.64575131 squared
The radius of a circle is the distance from the centre of the circle to its circumference - which is the outer limit of the circle.
Area of a circle = pi*radius squared
If: x^2+y^2 -4x -2y -4 = 0 Then by completing the squares of x and y: (x-2)^2+(y-1)^2 = 9 Therefore the centre of the circle is at (2, 1) and its radius is 3 units
If you are 13 years old when were you born?
Asked By Wiki User
Asked By Wiki User
Asked By Wiki User
Asked By Noah Schuster
Why does rupaul wear a colostomy bag?
Asked By Wiki User
What is the denotative and connotative meaning of clouds?
Asked By Wiki User
Ano ang kultura at tradisyon ng bansang England o inglaterra?
Asked By Wiki User
Asked By Wiki User
Copyright © 2021 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.