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frutty [35]
3 years ago
10

I need help with #20

Mathematics
3 answers:
lora16 [44]3 years ago
8 0

Hey there!

Formula given :

A = πr²

Solve for r

A / π = r²

r = √( A / π )

Hope it helps!

g100num [7]3 years ago
5 0
Hope this helps.
i have solved the equation to help you get a better of how to demonstrate this in the future.

Darina [25.2K]3 years ago
3 0
A=pi r^2
sqrt(A)=pi r
sqrt(A)/pi=r

Answer:sqrt(A)/pi=r

(sqrt(A) means the square root of A)
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After a storm, two street lights with the same length are leaning against each
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Answer:

c = 4.79 feet

Step-by-step explanation:

Given question is incomplete without a picture; find the question with the attachment.

Two poles AD and DB of same length are leaning against each other.

Distance between the poles (AB) = 45 feet

m(∠ADB) = 180°- (60 + 50)°

               = 70°

By sine rule,

\frac{sin50}{AD}=\frac{sin70}{45}=\frac{sin60}{DB}

AD=\frac{45\times (sin50)}{sin70}

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Similarly,

DB = \frac{45\times sin60}{sin70}

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Now c = DB - AD

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3 years ago
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36 degrees for each angle.

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