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Andre45 [30]
4 years ago
7

PLZ HELP ASAP CIRCLES

Mathematics
1 answer:
love history [14]4 years ago
4 0
First we need to convert the given equation to standard form, then we can write the center and radius directly from it.

x^{2} -16x+ y^{2} -36=0 \\  \\ 
 x^{2} -2(x)(8)+ y^{2} = 36 \\  \\ 
 x^{2} -2(x)(8)+ 8^{2}+  y^{2} =36 +8^{2} \\  \\ 
(x-8)^{2}+y^{2}=100

Thus, we can say now:

Center of the circle is (8,0) and its radius is 10.
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Find the area of the shaded region
ale4655 [162]

Answer:

379.56ft²

Step-by-step explanation:

Oh lordy why, okay we got this:

So we're going to start with the area of the square, this is easy because all of the sides are 25ft, so we just have to plug into our formula for squares (base x height):

25 x 25 = 625

Now we have to do the semicircle, remember that the formula for the area of a circle is pi x radius², we're using 3.14 for pi, so we have to find the radius (half the diameter):

25 ÷ 2 = 12.5

12.5² = 156.25

3.14 x 156.25 = 490.625‬

Normally we would stop here, but because this is only a semicircle, we have to divide by two:

490.625‬ ÷ 2 = 245.3125‬

So, now that we have our two areas, we have to subtract the semicircle from the square:

625 - 245.3125‬ = 379.6875‬

Now, I realize that his answer isn't in your cute little word bank, but that because I rounded pi, so the closest is 379.56

So, the area of the figure is 379.56ft²

if this is wrong let me know so I can fix it

hope this helps:)

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$23 marked down by 15%.
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Answer:

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Step-by-step explanation:

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