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3 years ago

14

Mathematics

2 answers:

mr_godi [17]3 years ago

7 0

radius=1/2 diameter
are=radius^2*3.14
Hope I helped, and good luck!

gavmur [86]3 years ago

6 0

I believe the correct answer is B. 49 mm2

because the r=7

then do the formula A=3.14*7²

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Starting from the fundamental trigonometric equation, we have

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Since $180$ , we know that the angle lies in the third quadrant, where both sine and cosine are negative. So, in this specific case, we have

$\sin(\alpha)=-\sqrt{1-\cos^2(\alpha)}$

Plugging the numbers, we have

$\sin(\alpha)=-\sqrt{1-\dfrac{64}{289}}=-\sqrt{\dfrac{225}{289}}=-\dfrac{15}{17}$

Now, just recall that

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Step-by-step explanation:

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2. Then use foil to multiply:

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