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Lashuante4722
19.07.2019 •
Mathematics
Need quick, ? a circle is centered at the point (5, -4) and passes through the point (-3, 2). the equation of this circle is (x + + (y + =
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Ответ:
(x – h)² + (y – k)² = r², where (h,k) is the coordinate of the center.
We already know that (h,k) = (5,-4), since we know the center's coordinates. We need to find r, the radius, using the distance between the center and the point (-3,2).
To do this, we can either use the distance formula, or plug in the points in our circle equation and solve for r.
Let's do the second one, plugging in and solving for r.
We can use the point (-3,2) for (x,y):
(x – h)² + (y – k)² = r²
(-3 - 5)² + (2 - -4)² = r²
(-8)² +(6)² = r²
64 + 36 = r²
100 = r²
r = 10
We know that r=10, and that r² = 100
Using h, k, and r, we can now solve for the equation of the circle in standard form.
The equation of the circle is:
(x – 5)² + (y + 4)² = 100
Ответ:
you place the point of the top coordinate then you round up for the final answer after dividing
Step-by-step explanation: