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3 years ago

Write an equation of the circle with center (-8,4) and diameter 6 .

Mathematics

1 answer:

ra1l [238]3 years ago

4 0

Answer:

(x+8)^2 + (y-4)^2 = 3^2

(x+8)^2 + (y-4)^2 = 9

Step-by-step explanation:

The diameter is 6, so the radius would be d/2 =3

The equation of a circle is

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

where (h,k) is the center and r is the radius

(x- -8)^2 + (y-4)^2 = 3^2

(x+8)^2 + (y-4)^2 = 3^2

(x+8)^2 + (y-4)^2 = 9

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Step-by-step explanation:

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3 years ago

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3 years ago

Find the circumference in terms of pic if the diameter is 2.5

otez555 [7]

Answer

$C=2.5\pi$

Step-by-step explanation:

Radius is always half of the diameter so, $\frac{2.5}{2} \\$ is equal to $1.25$ .

The Formula for Circumference is $C=2\pi r$

Since we found out the radius, we need to basically substitute (or insert) it into the radius spot so the next step will be: $C=2\pi (1.25)$

Then we multiply (2)(1.25) to get an answer of 2.5 (which we already know)

So our answer is going to be $C=2.5\pi$

Hope this helped and answers your question! Have a great rest of your day/night!

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3 years ago