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Sidana [21]
2 years ago
12

In the diagram, a circle centered at the origin, a right triangle, and the Pythagorean theorem are used to derive the equation o

f a circle, x2 + y2 = r2.
If the center of the circle were moved from the origin to the point (h, k) and point P at (x, y) remains on the edge of the circle, which could represent the equation of the new circle?

A: (h + x)2 + (k + y)2 = r2
B: (x – h)2 + (y – k)2 = r2
C: (k + x)2 + (h + y)2 = r2
D: (x – k)2 + (y – h)2 = r2

Mathematics
2 answers:
ra1l [238]2 years ago
5 0

Answer:

B

Step-by-step explanation:

\textsf{Let}\:(x_1,y_1)=(h,k) → new center of the circle

\textsf{Let}\:(x_2,y_2)=(x,y) → point on the circle

Therefore, the radius (r) is the distance between (x, y) and (h, k)

Use the distance formula:

\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}=d

\implies \sqrt{(x-h)^2+(y-k)^2}=r

Square both sides:

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

MAVERICK [17]2 years ago
4 0

Answer:

Option B

Step-by-step explanation:

Then we have to use distance formula to derive it

  • √(x-h)²+(y-k)²=r
  • (x-h)²+(y-k)²=r²

Option B is correct

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