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Mamont248 [21]
2 years ago
10

I don't understand how to answer this​

Mathematics
1 answer:
IgorLugansk [536]2 years ago
4 0

Answer:

\large\boxe{D)\ \dfrac{1}{2}\pi\ feet}

Step-by-step explanation:

Step 1:

Calculate the circumference of both circles.

The formula of a circumference:of a circle with radius r:

C=2\pi r

The circle R:

C_R=2\pi\left(\dfrac{2}{3}\right)=\dfrac{4\pi}{3}\ ft

The circle S:

C_S=2\pi\left(\dfrac{3}{4}\right)=\dfrac{3\pi}{2}\ ft

The length of the intercepted arc for circle R is

l=\dfrac{4\pi}{9}\ ft

Step 2:

Calculate what the part of the circumference of the circle R is the intercepted arc:

\dfrac{4\pi}{9}:\dfrac{4\pi}{3}=\dfrac{4\pi}{9}\cdot\dfrac{3}{4\pi}=\dfrac{1}{3}

The same length of the circumference of the circle S is searched for the length of the intercepted arc for circle S.

Step 3:

Calculate the length of the intercepted arc for circle S:

\dfrac{1}{3}\cdot\dfrac{3\pi}{2}=\dfrac{1}{2}\pi\ ft

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An architect is sketching a blueprint of a patio for a new fence

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