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hello :
an equation of the circle Center at the
O(a,b) and ridus : r is :
(x-a)² +(y-b)² = r²
in this exercice : a =0 and b = 0 (Center at the origin)
r = AO
r² = (AO)²
r² = (4-0)² +(5-0)² = 16+25=41
an equation of the circle that satisfies the stated conditions.
Center at the origin, passing through B(4, 5) is : x² +y² = 41
x² +y² - 41=0
Equation of a graph is a mathematical statement true only for points of that graph. The equation of specified circle is:Option b) x² + y² −41 = 0
What is the equation of a circle with radius r units, centered at (x,y) ?
If a circle O has radius of r units length and that it has got its center positioned at (h, k) point of the coordinate plane, then, its equation is given as:
[tex](x-h)^2 + (y-k)^2 = r^2[/tex]
What is the distance between two points ( p,q) and (x,y)?
The shortest distance(straight line segment's length connecting both given points) between points ( p,q) and (x,y) is:
D = √[(x-p)² + (y-q)²] units.
For given case, we have h = 0, and k = 0,
Also, we've got radius = distance between O and B as length of radius, which is
r = √[(4-0)² + (5-0)²] = √[16+25] = √41 units.
Thus, we have the equation as:
(x-h)² + (y-k)² = r²
x²+ y² = (√41 )²
x² + y² = 41
x² + y² - 41 = 0
Thus, The equation of specified circle is:Option b) x² + y² - 41 = 0
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