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3 years ago

What is the approximate circumference of the circle shown below

Mathematics

2 answers:

netineya [11]3 years ago

8 0

Answer:

Step-by-step explanation:

to find circumference of a circle you need to multiple r (7 in here) with 2 and pi

therefore the answer is : 2x7x3 = 42 or 44 approximately

Rina8888 [55]3 years ago

6 0

Answer:

$C\approx44\: cm$

Step-by-step explanation:

1) The Circumference of a Circle is its Perimeter given by $C=2\pi r$ . In this case, signed by a red line.

2) And $\pi \approx3.14$ with the given radius of 7 cm

3) Hence,

$C=2*3.14*7\Rightarrow C\approx44\: cm$

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The exact value of cos5pi/12 is:

jonny [76]

Step 1: Convert $\frac{5\pi }{12}$ , which is in radians into degrees. To convert it multiply by $\frac{180}{\pi }$

$\frac{5\pi }{12} =\frac{180}{\pi }$

900/12

Step 2: 75 degrees isn't on the unit circle but 45 degrees and 30 degrees is. Since 45 + 30 = 75 you can use the cosine of 45 and 30 to find the exact value

cos45 = $\frac{\sqrt{2} }{2}$

cos30 = $\frac{\sqrt{3} }{2}$

Step 3: Add the cos45 and cos30 to get cos5pi/12

$\frac{\sqrt{2} }{2} +\frac{\sqrt{3} }{2} = \frac{\sqrt{2}+\sqrt{3}}{2}$

Hope this helped!

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3 years ago

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emmainna [20.7K]

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A website has a daily trivia contest. On mondays, wednesday, fridays, you have 1 ½ hours to submit an answer. On tuesdays and th

Alex73 [517]

Answer:

8 1/2 hrs/wk

Step-by-step explanation:

3(1 1/2 hrs) plus

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