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PolarNik [594]
3 years ago
6

How do you find the area of a circle

Mathematics
2 answers:
iVinArrow [24]3 years ago
6 0
Hey there! :) 

The area of a circle is : 

a = πr²

The variables mean : 

a = area

π = pi (also commonly known as 3.14)

r = radius

**Remember : the radius is half of the diameter**

~Hope I helped!~
Svetllana [295]3 years ago
5 0
The formula is pi times the radius squared
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Find the greatest common factor for this number pair. 30, 8
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Answer:

Step-by-step explanation:

To factor a number means to break it up into numbers that can be multiplied together to get the original number:

Therefore, factors of 30 and 8

30: 2×3×5

8: 2×2×2

Then, the common factor is 2

Only 2 can be divided both 8 and 30.

If you need to know all the factor of 30 and 8

30: 1,2,3,5,6,15, and 30

8: 1,2,4 and 8

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-7–5(3g+8)&lt;10g–7+g <br><br> help me please!
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Answer:

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-7–5(3g+8)<10g–7+g

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Add 15 g to each side

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4 years ago
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Find a single expression that represents the area of the outer ring of the circle if the area of the whole circle is represented
sp2606 [1]

Answer:  The answer is A_o=2\pi\sqrt{\dfrac{7}{22}(25x^2-12x-9)}.


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Now, if 'r' represents the radius of the circle, then we have

A_c=\pi r^2\\\\\Rightarrow \dfrac{22}{7}r^2=25x^2-12x-9\\\\ \Rightarrow r^2=\dfrac{7}{22}(25x^2-12x-9)\\\\\Rightarrow r=\sqrt{\dfrac{7}{22}(25x^2-12x-9)}.

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A_o=2\pi r=2\pi\sqrt{\dfrac{7}{22}(25x^2-12x-9)}.


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